RandomKey class update, add methods to strings, json, array class, fix phpstan errors in other classes, add tests

src/Basic.php

@@ -383,7 +383,8 @@ class Basic
 	public function initRandomKeyLength(int $key_length): bool
 	{
 		trigger_error('Method ' . __METHOD__ . ' is deprecated, use \CoreLibs\Create\RandomKey::setRandomKeyLength()', E_USER_DEPRECATED);
-		return \CoreLibs\Create\RandomKey::setRandomKeyLength($key_length);
+		// no op, we do no longer pre set the random key length
+		return true;
 	}
 
 	/**
@@ -988,10 +989,10 @@ class Basic
 	 * @param  bool   $auto_check      default true, if source encoding is set
 	 *                                 check that the source is actually matching
 	 *                                 to what we sav the source is
-	 * @return string                  encoding converted string
+	 * @return string|false            encoding converted string
 	 * @deprecated use \CoreLibs\Convert\Encoding::convertEncoding() instead
 	 */
-	public static function convertEncoding(string $string, string $to_encoding, string $source_encoding = '', bool $auto_check = true): string
+	public static function convertEncoding(string $string, string $to_encoding, string $source_encoding = '', bool $auto_check = true): string|false
 	{
 		trigger_error('Method ' . __METHOD__ . ' is deprecated, use \CoreLibs\Convert\Encoding::convertEncoding()', E_USER_DEPRECATED);
 		return \CoreLibs\Convert\Encoding::convertEncoding($string, $to_encoding, $source_encoding, $auto_check);

src/Check/Encoding.php

@@ -56,7 +56,11 @@ class Encoding
 	{
 		// return mb_substitute_character();
 		if ($return_substitute_func === true) {
-			return mb_substitute_character();
+			// if false abort with error
+			if (($return = mb_substitute_character()) === false) {
+				return self::$mb_error_char;
+			}
+			return $return;
 		} else {
 			return self::$mb_error_char;
 		}
@@ -88,7 +92,13 @@ class Encoding
 	): array|false {
 		// convert to target encoding and convert back
 		$temp = mb_convert_encoding($string, $to_encoding, $from_encoding);
+		if ($temp === false) {
+			return false;
+		}
 		$compare = mb_convert_encoding($temp, $from_encoding, $to_encoding);
+		if ($compare === false) {
+			return false;
+		}
 		// if string does not match anymore we have a convert problem
 		if ($string == $compare) {
 			return false;

src/Combined/ArrayHandler.php

@@ -10,6 +10,8 @@ namespace CoreLibs\Combined;
 
 class ArrayHandler
 {
+	public const string DATA_SEPARATOR = ':';
+
 	/**
 	 * searches key = value in an array / array
 	 * only returns the first one found
@@ -148,18 +150,22 @@ class ArrayHandler
 	 * array search simple. looks for key, value combination, if found, returns true
 	 * on default does not strict check, so string '4' will match int 4 and vica versa
 	 *
-	 * @param  array<mixed>    $array search in as array
+	 * @param  array<mixed>           $array search in as array
-	 * @param  string|int      $key    key (key to search in)
+	 * @param  string|int             $key   key (key to search in)
-	 * @param  string|int|bool $value  value (what to find)
+	 * @param  string|int|bool|array<string|int|bool> $value  values list (what to find)
-	 * @param  bool            $strict [false], if set to true, will strict check key/value
+	 * @param  bool                   $strict [false], if set to true, will strict check key/value
-	 * @return bool            true on found, false on not found
+	 * @return bool                   true on found, false on not found
 	 */
 	public static function arraySearchSimple(
 		array $array,
 		string|int $key,
-		string|int|bool $value,
+		string|int|bool|array $value,
 		bool $strict = false
 	): bool {
+		// convert to array
+		if (!is_array($value)) {
+			$value = [$value];
+		}
 		foreach ($array as $_key => $_value) {
 			// if value is an array, we search
 			if (is_array($_value)) {
@@ -167,9 +173,9 @@ class ArrayHandler
 				if (($result = self::arraySearchSimple($_value, $key, $value, $strict)) !== false) {
 					return $result;
 				}
-			} elseif ($strict === false && $_key == $key && $_value == $value) {
+			} elseif ($strict === false && $_key == $key && in_array($_value, $value)) {
 				return true;
-			} elseif ($strict === true && $_key === $key && $_value === $value) {
+			} elseif ($strict === true && $_key === $key && in_array($_value, $value, true)) {
 				return true;
 			}
 		}
@@ -236,6 +242,160 @@ class ArrayHandler
 		return $hit_list;
 	}
 
+	/**
+	 * Search in an array for value with or without key and
+	 * check in the same array block for the required key
+	 * If not found return an array with the array block there the required key is missing,
+	 * the path as string with seperator block set and the missing key entry
+	 *
+	 * @param  array<mixed>          $array
+	 * @param  string|int|float|bool $search_value
+	 * @param  string|array<string>  $required_key
+	 * @param  ?string               $search_key [null]
+	 * @param  string                $path_separator [DATA_SEPARATOR]
+	 * @param  string                $current_path
+	 * @return array<array{content?:array<mixed>,path?:string,missing_key?:array<string>}>
+	 */
+	public static function findArraysMissingKey(
+		array $array,
+		string|int|float|bool $search_value,
+		string|array $required_key,
+		?string $search_key = null,
+		string $path_separator = self::DATA_SEPARATOR,
+		string $current_path = ''
+	): array {
+		$results = [];
+		foreach ($array as $key => $value) {
+			$path = $current_path ? $current_path . $path_separator . $key : $key;
+
+			if (is_array($value)) {
+				// Check if this array contains the search value
+				// either any value match or with key
+				if ($search_key === null) {
+					$containsValue = in_array($search_value, $value, true);
+				} else {
+					$containsValue = array_key_exists($search_key, $value) && $value[$search_key] === $search_value;
+				}
+
+				// If it contains the value but doesn't have the required key
+				if (
+					$containsValue &&
+					(
+						(
+							is_string($required_key) &&
+							!array_key_exists($required_key, $value)
+						) || (
+							is_array($required_key) &&
+							count(array_intersect($required_key, array_keys($value))) !== count($required_key)
+						)
+					)
+				) {
+					$results[] = [
+						'content' => $value,
+						'path' => $path,
+						'missing_key' => is_array($required_key) ?
+							array_values(array_diff($required_key, array_keys($value))) :
+							[$required_key]
+					];
+				}
+
+				// Recursively search nested arrays
+				$results = array_merge(
+					$results,
+					self::findArraysMissingKey(
+						$value,
+						$search_value,
+						$required_key,
+						$search_key,
+						$path_separator,
+						$path
+					)
+				);
+			}
+		}
+
+		return $results;
+	}
+
+	/**
+	 * Find key => value entry and return set with key for all matching
+	 * Can search recursively through nested arrays if recursive flag is set
+	 *
+	 * @param  array<mixed> $array
+	 * @param  string $lookup
+	 * @param  int|string|float|bool $search
+	 * @param  bool $strict [false]
+	 * @param  bool $case_insensitive [false]
+	 * @param  bool $recursive [false]
+	 * @param  bool $flat_result [true] If set to false and recursive is on the result is a nested array
+	 * @param  string $flat_separator [DATA_SEPARATOR] if flat result is true, can be any string
+	 * @return array<mixed>
+	 */
+	public static function selectArrayFromOption(
+		array $array,
+		string $lookup,
+		int|string|float|bool $search,
+		bool $strict = false,
+		bool $case_insensitive = false,
+		bool $recursive = false,
+		bool $flat_result = true,
+		string $flat_separator = self::DATA_SEPARATOR
+	): array {
+		// skip on empty
+		if ($array == []) {
+			return [];
+		}
+		// init return result
+		$result = [];
+		// case sensitive convert if string
+		if ($case_insensitive && is_string($search)) {
+			$search = strtolower($search);
+		}
+
+		foreach ($array as $key => $value) {
+			// Handle current level search
+			if (isset($value[$lookup])) {
+				$compareValue = $value[$lookup];
+
+				if ($case_insensitive && is_string($compareValue)) {
+					$compareValue = strtolower($compareValue);
+				}
+
+				if (
+					($strict && $search === $compareValue) ||
+					(!$strict && $search == $compareValue)
+				) {
+					$result[$key] = $value;
+				}
+			}
+			// Handle recursive search if flag is set
+			if ($recursive && is_array($value)) {
+				$recursiveResults = self::selectArrayFromOption(
+					$value,
+					$lookup,
+					$search,
+					$strict,
+					$case_insensitive,
+					true,
+					$flat_result,
+					$flat_separator
+				);
+
+				// Merge recursive results with current results
+				// Preserve keys by using array_merge with string keys or + operator
+				foreach ($recursiveResults as $recKey => $recValue) {
+					if ($flat_result) {
+						$result[$key . $flat_separator . $recKey] = $recValue;
+					} else {
+						$result[$key][$recKey] = $recValue;
+					}
+				}
+			}
+		}
+
+		return $result;
+	}
+
 	/**
 	 * main wrapper function for next/prev key
 	 *
@@ -553,12 +713,13 @@ class ArrayHandler
 	}
 
 	/**
-	 * Modifieds the key of an array with a prefix and/or suffix and returns it with the original value
+	 * Modifieds the key of an array with a prefix and/or suffix and
+	 * returns it with the original value
 	 * does not change order in array
 	 *
 	 * @param  array<string|int,mixed> $in_array
-	 * @param  string                  $key_mod_prefix [default=''] key prefix string
+	 * @param  string                  $key_mod_prefix [''] key prefix string
-	 * @param  string                  $key_mod_suffix [default=''] key suffix string
+	 * @param  string                  $key_mod_suffix [''] key suffix string
 	 * @return array<string|int,mixed>
 	 */
 	public static function arrayModifyKey(
@@ -581,6 +742,72 @@ class ArrayHandler
 			array_values($in_array)
 		);
 	}
+
+	/**
+	 * sort array and return in same call
+	 * sort ascending or descending with or without lower case convert
+	 * value only, will loose key connections unless preserve_keys is set to true
+	 *
+	 * @param  array<mixed> $array array to sort by values
+	 * @param  int          $params sort flags
+	 * @return array<mixed>
+	 */
+	public static function sortArray(
+		array $array,
+		bool $case_insensitive = false,
+		bool $reverse = false,
+		bool $maintain_keys = false,
+		int $params = SORT_REGULAR
+	): array {
+		$fk_sort_lower_case = function (string $a, string $b): int {
+			return strtolower($a) <=> strtolower($b);
+		};
+		$fk_sort_lower_case_reverse = function (string $a, string $b): int {
+			return strtolower($b) <=> strtolower($a);
+		};
+		$case_insensitive ? (
+			$maintain_keys ?
+				(uasort($array, $reverse ? $fk_sort_lower_case_reverse : $fk_sort_lower_case)) :
+				(usort($array, $reverse ? $fk_sort_lower_case_reverse : $fk_sort_lower_case))
+		) :
+		(
+			$maintain_keys ?
+				($reverse ? arsort($array, $params) : asort($array, $params)) :
+				($reverse ? rsort($array, $params) : sort($array, $params))
+		);
+		return $array;
+	}
+
+	/**
+	 * sort by key ascending or descending and return
+	 *
+	 * @param  array<mixed> $array
+	 * @param  bool         $case_insensitive [false]
+	 * @param  bool         $reverse [false]
+	 * @return array<mixed>
+	 */
+	public static function ksortArray(array $array, bool $case_insensitive = false, bool $reverse = false): array
+	{
+		$fk_sort_lower_case = function (string $a, string $b): int {
+			return strtolower($a) <=> strtolower($b);
+		};
+		$fk_sort_lower_case_reverse = function (string $a, string $b): int {
+			return strtolower($b) <=> strtolower($a);
+		};
+		$fk_sort = function (string $a, string $b): int {
+			return $a <=> $b;
+		};
+		$fk_sort_reverse = function (string $a, string $b): int {
+			return $b <=> $a;
+		};
+		uksort(
+			$array,
+			$case_insensitive ?
+				($reverse ? $fk_sort_lower_case_reverse : $fk_sort_lower_case) :
+				($reverse ? $fk_sort_reverse : $fk_sort)
+		);
+		return $array;
+	}
 }
 
 // __END__

src/Convert/Encoding.php

@@ -23,14 +23,14 @@ class Encoding
 	 * @param  bool   $auto_check      default true, if source encoding is set
 	 *                                 check that the source is actually matching
 	 *                                 to what we sav the source is
-	 * @return string                  encoding converted string
+	 * @return string|false            encoding converted string or false on error
 	 */
 	public static function convertEncoding(
 		string $string,
 		string $to_encoding,
 		string $source_encoding = '',
 		bool $auto_check = true
-	): string {
+	): string|false {
 		// set if not given
 		if (!$source_encoding) {
 			$source_encoding = mb_detect_encoding($string);

src/Convert/Json.php

@@ -119,6 +119,23 @@ class Json
 		}
 		return $return_string === true ? $json_error_string : self::$json_last_error;
 	}
+
+	/**
+	 * wrapper to call convert array to json with pretty print
+	 *
+	 * @param  array<mixed>  $data
+	 * @return string
+	 */
+	public static function jsonPrettyPrint(array $data): string
+	{
+		return self::jsonConvertArrayTo(
+			$data,
+			JSON_PRETTY_PRINT |
+			JSON_UNESCAPED_LINE_TERMINATORS |
+			JSON_UNESCAPED_SLASHES |
+			JSON_UNESCAPED_UNICODE
+		);
+	}
 }
 
 // __END__

src/Convert/Strings.php

@@ -8,8 +8,20 @@ declare(strict_types=1);
 
 namespace CoreLibs\Convert;
 
+use CoreLibs\Combined\ArrayHandler;
+
 class Strings
 {
+	/** @var array<int,string> all the preg error messages */
+	public const array PREG_ERROR_MESSAGES = [
+		PREG_NO_ERROR => 'No error',
+		PREG_INTERNAL_ERROR => 'Internal PCRE error',
+		PREG_BACKTRACK_LIMIT_ERROR => 'Backtrack limit exhausted',
+		PREG_RECURSION_LIMIT_ERROR => 'Recursion limit exhausted',
+		PREG_BAD_UTF8_ERROR => 'Malformed UTF-8 data',
+		PREG_BAD_UTF8_OFFSET_ERROR => 'Bad UTF-8 offset',
+		PREG_JIT_STACKLIMIT_ERROR => 'JIT stack limit exhausted'
+	];
 	/**
 	 * return the number of elements in the split list
 	 * 0 if nothing / invalid split
@@ -52,29 +64,42 @@ class Strings
 	 * Note a string LONGER then the maxium will be attached with the LAST
 	 * split character. In above exmaple
 	 * ABCD1234EFGHTOOLONG will be ABCD-1234-EFGH-TOOLONG
+	 * If the characters are NOT ASCII it will return the string as is
 	 *
-	 * @param  string $value            string value to split
+	 * @param  string $string           string value to split
 	 * @param  string $split_format     split format
-	 * @param  string $split_characters list of charcters with which we split
-	 *                                  if not set uses dash ('-')
 	 * @return string                   split formatted string or original value if not chnaged
+	 * @throws \InvalidArgumentException for empty split format, invalid values, split characters or split format
 	 */
 	public static function splitFormatString(
-		string $value,
+		string $string,
 		string $split_format,
-		string $split_characters = '-'
 	): string {
-		if (
+		// skip if string or split format is empty is empty
-			// abort if split format is empty
+		if (empty($string) || empty($split_format)) {
-			empty($split_format) ||
+			return $string;
-			// if not in the valid ASCII character range for any of the strings
+		}
-			preg_match('/[^\x20-\x7e]/', $value) ||
+		if (preg_match('/[^\x20-\x7e]/', $string)) {
-			// preg_match('/[^\x20-\x7e]/', $split_format) ||
+			throw new \InvalidArgumentException(
-			preg_match('/[^\x20-\x7e]/', $split_characters) ||
+				"The string to split can only be ascii characters: " . $string
-			// only numbers and split characters in split_format
+			);
-			!preg_match("/[0-9" . $split_characters . "]/", $split_format)
+		}
-		) {
+		// get the split characters that are not numerical and check they are ascii
-			return $value;
+		$split_characters = self::removeDuplicates(preg_replace('/[0-9]/', '', $split_format) ?: '');
+		if (empty($split_characters)) {
+			throw new \InvalidArgumentException(
+				"A split character must exist in the format string: " . $split_format
+			);
+		}
+		if (preg_match('/[^\x20-\x7e]/', $split_characters)) {
+			throw new \InvalidArgumentException(
+				"The split character has to be a valid ascii character: " . $split_characters
+			);
+		}
+		if (!preg_match("/^[0-9" . $split_characters . "]+$/", $split_format)) {
+			throw new \InvalidArgumentException(
+				"The split format can only be numbers and the split characters: " . $split_format
+			);
 		}
 		// split format list
 		$split_list = preg_split(
@@ -86,14 +111,14 @@ class Strings
 		);
 		// if this is false, or only one array, abort split
 		if (!is_array($split_list) || count($split_list) == 1) {
-			return $value;
+			return $string;
 		}
 		$out = '';
 		$pos = 0;
 		$last_split = '';
 		foreach ($split_list as $offset) {
 			if (is_numeric($offset)) {
-				$_part = substr($value, $pos, (int)$offset);
+				$_part = substr($string, $pos, (int)$offset);
 				if (empty($_part)) {
 					break;
 				}
@@ -104,8 +129,8 @@ class Strings
 				$last_split = $offset;
 			}
 		}
-		if (!empty($out) && $pos < strlen($value)) {
+		if (!empty($out) && $pos < strlen($string)) {
-			$out .= $last_split . substr($value, $pos);
+			$out .= $last_split . substr($string, $pos);
 		}
 		// if last is not alphanumeric remove, remove
 		if (!strcspn(substr($out, -1, 1), $split_characters)) {
@@ -115,10 +140,49 @@ class Strings
 		if (!empty($out)) {
 			return $out;
 		} else {
-			return $value;
+			return $string;
 		}
 	}
 
+	/**
+	 * Split a string into n-length blocks with a split character inbetween
+	 * This is simplified version from splitFormatString that uses
+	 * fixed split length with a characters, this evenly splits the string out into the
+	 * given length
+	 * This works with non ASCII characters too
+	 *
+	 * @param  string $string           string to split
+	 * @param  int    $split_length     split length, must be smaller than string and larger than 0
+	 * @param  string $split_characters [default=-] the character to split, can be more than one
+	 * @return string
+	 * @throws \InvalidArgumentException Thrown if split length style is invalid
+	 */
+	public static function splitFormatStringFixed(
+		string $string,
+		int $split_length,
+		string $split_characters = '-'
+	): string {
+		// if empty string or if split lenght is 0 or empty split characters
+		// then we skip any splitting
+		if (empty($string) || $split_length == 0 || empty($split_characters)) {
+			return $string;
+		}
+		$return_string = '';
+		$string_length = mb_strlen($string);
+		// check that the length is not too short
+		if ($split_length < 1 || $split_length >= $string_length) {
+			throw new \InvalidArgumentException(
+				"The split length must be at least 1 character and less than the string length to split. "
+				. "Split length: " . $split_length . ", string length: " . $string_length
+			);
+		}
+		for ($i = 0; $i < $string_length; $i += $split_length) {
+			$return_string .= mb_substr($string, $i, $split_length) . $split_characters;
+		}
+		// remove last trailing character which is always the split char length
+		return mb_substr($return_string, 0, -1 * mb_strlen($split_characters));
+	}
+
 	/**
 	 * Strip any duplicated slahes from a path
 	 * eg: //foo///bar/foo.inc -> /foo/bar/foo.inc
@@ -146,6 +210,116 @@ class Strings
 	{
 		return trim($text, pack('H*', 'EFBBBF'));
 	}
+
+	/**
+	 * Make as string of characters unique
+	 *
+	 * @param  string $string
+	 * @return string
+	 */
+	public static function removeDuplicates(string $string): string
+	{
+		// combine again
+		$result = implode(
+			'',
+			// unique list
+			array_unique(
+				// split into array
+				mb_str_split($string)
+			)
+		);
+
+		return $result;
+	}
+
+	/**
+	 * check if all characters are in set
+	 *
+	 * @param  string $needle   Needle to search
+	 * @param  string $haystack Haystack to search in
+	 * @return bool             True on found, False if not in haystack
+	 */
+	public static function allCharsInSet(string $needle, string $haystack): bool
+	{
+		$input_length = strlen($needle);
+
+		for ($i = 0; $i < $input_length; $i++) {
+			if (strpos($haystack, $needle[$i]) === false) {
+				return false;
+			}
+		}
+
+		return true;
+	}
+
+	/**
+	 * converts a list of arrays of strings into a string of unique entries
+	 * input arrays can be nested, only values are used
+	 *
+	 * @param  array<mixed> ...$char_lists
+	 * @return string
+	 */
+	public static function buildCharStringFromLists(array ...$char_lists): string
+	{
+		return implode('', array_unique(
+			ArrayHandler::flattenArray(
+				array_merge(...$char_lists)
+			)
+		));
+	}
+
+	/**
+	 * Check if a regex is valid. Does not return the detail regex parser error
+	 *
+	 * @param  string $pattern Any regex string
+	 * @return bool            False on invalid regex
+	 */
+	public static function isValidRegex(string $pattern): bool
+	{
+		preg_last_error();
+		try {
+			$var = '';
+			@preg_match($pattern, $var);
+			return preg_last_error() === PREG_NO_ERROR;
+		} catch (\Error $e) {
+			return false;
+		}
+	}
+
+	/**
+	 * Returns the last preg error messages as string
+	 * all messages are defined in PREG_ERROR_MESSAGES
+	 *
+	 * @return string
+	 */
+	public static function getLastRegexErrorString(): string
+	{
+		return self::PREG_ERROR_MESSAGES[preg_last_error()] ?? 'Unknown error';
+	}
+
+	/**
+	 * check if a regex is invalid, returns array with flag and error string
+	 *
+	 * @param  string $pattern
+	 * @return array{valid:bool,preg_error:int,error:null|string,pcre_error:null|string}
+	 */
+	public static function validateRegex(string $pattern): array
+	{
+		// Clear any previous PCRE errors
+		preg_last_error();
+		$var = '';
+		if (@preg_match($pattern, $var) === false) {
+			$error = preg_last_error();
+			return [
+				'valid' => false,
+				'preg_error' => $error,
+				'error' => self::PREG_ERROR_MESSAGES[$error] ?? 'Unknown error',
+				'pcre_error' => preg_last_error_msg(),
+			];
+		}
+
+		return ['valid' => true, 'preg_error' => PREG_NO_ERROR, 'error' => null, 'pcre_error' => null];
+	}
 }
 
 // __END__

src/Create/Email.php

@@ -38,6 +38,7 @@ class Email
 	 * @param  string $encoding   Encoding, if not set UTF-8
 	 * @param  bool   $kv_folding If set to true and a valid encoding, do KV folding
 	 * @return string             Correctly encoded and build email string
+	 * @throws \IntlException if email name cannot be converted to UTF-8
 	 */
 	public static function encodeEmailName(
 		string $email,
@@ -52,6 +53,10 @@ class Email
 		if ($encoding != 'UTF-8') {
 			$email_name = mb_convert_encoding($email_name, $encoding, 'UTF-8');
 		}
+		// if we cannot transcode the name, return just the email
+		if ($email_name === false) {
+			throw new \IntlException('Cannot convert email_name to UTF-8');
+		}
 		$email_name =
 			mb_encode_mimeheader(
 				in_array($encoding, self::$encoding_kv_allowed) && $kv_folding ?
@@ -77,6 +82,8 @@ class Email
 	 * @param  bool                 $kv_folding If set to true and a valid encoding,
 	 *                                          do KV folding
 	 * @return array<string>                    Pos 0: Subject, Pos 1: Body
+	 * @throws \IntlException if subject cannot be converted to UTF-8
+	 * @throws \IntlException if body cannot be converted to UTF-8
 	 */
 	private static function replaceContent(
 		string $subject,
@@ -102,6 +109,12 @@ class Email
 			$subject = mb_convert_encoding($subject, $encoding, 'UTF-8');
 			$body = mb_convert_encoding($body, $encoding, 'UTF-8');
 		}
+		if ($subject === false) {
+			throw new \IntlException('Cannot convert subject to UTF-8');
+		}
+		if ($body === false) {
+			throw new \IntlException('Cannot convert body to UTF-8');
+		}
 		// we need to encodde the subject
 		$subject = mb_encode_mimeheader(
 			in_array($encoding, self::$encoding_kv_allowed) && $kv_folding ?

src/Create/RandomKey.php

@@ -8,39 +8,97 @@ declare(strict_types=1);
 
 namespace CoreLibs\Create;
 
+use CoreLibs\Convert\Strings;
+
 class RandomKey
 {
+	/** @var int set the default key length it nothing else is set */
+	public const int KEY_LENGTH_DEFAULT = 4;
+	/** @var int the maximum key length allowed */
+	public const int KEY_LENGTH_MAX = 256;
+	/** @var string the default characters in the key range */
+	public const string KEY_CHARACTER_RANGE_DEFAULT =
+		'ABCDEFGHIJKLMNOPQRSTUVWXYZ'
+		. 'abcdefghijklmnopqrstuvwxyz'
+		. '0123456789';
 	// key generation
-	/** @var string */
+	/** @var string all the characters that are int he current radnom key range */
-	private static string $key_range = '';
+	private static string $key_character_range = '';
-	/** @var int */
+	/** @var int character count in they key character range */
-	private static int $one_key_length;
+	private static int $key_character_range_length = 0;
-	/** @var int */
+	/** @var int default key lenghth */
-	private static int $key_length = 4; // default key length
+	/** @deprecated Will be removed */
-	/** @var int */
+	private static int $key_length = 4;
-	private static int $max_key_length = 256; // max allowed length
 
 	/**
 	 * if launched as class, init random key data first
+	 *
+	 * @param  array<string>  ...$key_range
 	 */
-	public function __construct()
+	public function __construct(array ...$key_range)
 	{
-		$this->initRandomKeyData();
+		$this->setRandomKeyData(...$key_range);
 	}
+
+	/**
+	 * internal key range validation
+	 *
+	 * @param  array<string>  ...$key_range
+	 * @return string
+	 */
+	private static function validateRandomKeyData(array ...$key_range): string
+	{
+		$key_character_range = Strings::buildCharStringFromLists(...$key_range);
+		if (strlen(self::$key_character_range) <= 1) {
+			return '';
+		}
+		return $key_character_range;
+	}
+
 	/**
 	 * sets the random key range with the default values
 	 *
+	 * @param  array<string> $key_range a list of key ranges as array
 	 * @return void has no return
+	 * @throws \LengthException If the string length is only 1 abort
 	 */
-	private static function initRandomKeyData(): void
+	public static function setRandomKeyData(array ...$key_range): void
 	{
-		// random key generation base string
+		// if key range is not set
-		self::$key_range = join('', array_merge(
+		if (!count($key_range)) {
-			range('A', 'Z'),
+			self::$key_character_range = self::KEY_CHARACTER_RANGE_DEFAULT;
-			range('a', 'z'),
+		} else {
-			range('0', '9')
+			self::$key_character_range = self::validateRandomKeyData(...$key_range);
-		));
+			// random key generation base string
-		self::$one_key_length = strlen(self::$key_range);
+		}
+		self::$key_character_range_length = strlen(self::$key_character_range);
+		if (self::$key_character_range_length <= 1) {
+			throw new \LengthException(
+				"The given key character range '" . self::$key_character_range . "' "
+				. "is too small, must be at lest two characters: "
+				. self::$key_character_range_length
+			);
+		}
+	}
+
+	/**
+	 * get the characters for the current key characters
+	 *
+	 * @return string
+	 */
+	public static function getRandomKeyData(): string
+	{
+		return self::$key_character_range;
+	}
+
+	/**
+	 * get the length of all random characters
+	 *
+	 * @return int
+	 */
+	public static function getRandomKeyDataLength(): int
+	{
+		return self::$key_character_range_length;
 	}
 
 	/**
@@ -53,7 +111,7 @@ class RandomKey
 	{
 		if (
 			$key_length > 0 &&
-			$key_length <= self::$max_key_length
+			$key_length <= self::KEY_LENGTH_MAX
 		) {
 			return true;
 		} else {
@@ -67,6 +125,7 @@ class RandomKey
 	 *
 	 * @param  int  $key_length key length
 	 * @return bool             true/false for set status
+	 * @deprecated This function does no longer set the key length, the randomKeyGen parameter has to b used
 	 */
 	public static function setRandomKeyLength(int $key_length): bool
 	{
@@ -83,6 +142,7 @@ class RandomKey
 	 * get the current set random key length
 	 *
 	 * @return int Current set key length
+	 * @deprecated Key length is set during randomKeyGen call, this nethid is deprecated
 	 */
 	public static function getRandomKeyLength(): int
 	{
@@ -94,28 +154,37 @@ class RandomKey
 	 * if override key length is set, it will check on valid key and use this
 	 * this will not set the class key length variable
 	 *
-	 * @param  int    $key_length key length override, -1 for use default
+	 * @param  int           $key_length [default=-1] key length override,
-	 * @return string             random key
+	 *                                   if not set use default [LEGACY]
+	 * @param  array<string> $key_range  a list of key ranges as array,
+	 *                                   if not set use previous set data
+	 * @return string                    random key
 	 */
-	public static function randomKeyGen(int $key_length = -1): string
+	public static function randomKeyGen(
-	{
+		int $key_length = self::KEY_LENGTH_DEFAULT,
-		// init random key strings if not set
+		array ...$key_range
-		if (
+	): string {
-			!isset(self::$one_key_length)
+		$key_character_range = '';
-		) {
+		if (count($key_range)) {
-			self::initRandomKeyData();
+			$key_character_range = self::validateRandomKeyData(...$key_range);
-		}
+			$key_character_range_length = strlen($key_character_range);
-		$use_key_length = 0;
-		// only if valid int key with valid length
-		if (self::validateRandomKeyLenght($key_length) === true) {
-			$use_key_length = $key_length;
 		} else {
-			$use_key_length = self::$key_length;
+			if (!self::$key_character_range_length) {
+				self::setRandomKeyData();
+			}
+			$key_character_range = self::getRandomKeyData();
+			$key_character_range_length = self::getRandomKeyDataLength();
+		}
+		// if not valid key length, fallback to default
+		if (!self::validateRandomKeyLenght($key_length)) {
+			$key_length = self::KEY_LENGTH_DEFAULT;
 		}
 		// create random string
 		$random_string = '';
-		for ($i = 1; $i <= $use_key_length; $i++) {
+		for ($i = 1; $i <= $key_length; $i++) {
-			$random_string .= self::$key_range[random_int(0, self::$one_key_length - 1)];
+			$random_string .= $key_character_range[
+				random_int(0, $key_character_range_length - 1)
+			];
 		}
 		return $random_string;
 	}

src/Logging/Logging.php

@@ -35,6 +35,7 @@ class Logging
 	/** @var string log file block separator, not changeable */
 	private const LOG_FILE_BLOCK_SEPARATOR = '.';
 
+	// MARK: OPTION array
 	// NOTE: the second party array{} hs some errors
 	/** @var array<string,array<string,string|bool|Level>>|array{string:array{type:string,type_info?:string,mandatory:true,alias?:string,default:string|bool|Level,deprecated:bool,use?:string}} */
 	private const OPTIONS = [
@@ -50,6 +51,7 @@ class Logging
 			'type' => 'string', 'mandatory' => false,
 			'default' => '', 'deprecated' => true, 'use' => 'log_file_id'
 		],
+		// log level
 		'log_level' => [
 			'type' => 'instance',
 			'type_info' => '\CoreLibs\Logging\Logger\Level',
@@ -57,6 +59,14 @@ class Logging
 			'default' => Level::Debug,
 			'deprecated' => false
 		],
+		// level to trigger write to error_log
+		'error_log_write_level' => [
+			'type' => 'instance',
+			'type_info' => '\CoreLibs\Logging\Logger\Level',
+			'mandatory' => false,
+			'default' => Level::Emergency,
+			'deprecated' => false,
+		],
 		// options
 		'log_per_run' => [
 			'type' => 'bool', 'mandatory' => false,
@@ -92,8 +102,10 @@ class Logging
 	/** @var array<mixed> */
 	private array $options = [];
 
-	/** @var Level set level */
+	/** @var Level set logging level */
 	private Level $log_level;
+	/** @var Level set level for writing to error_log, will not write if log level lower than error log write level */
+	private Level $error_log_write_level;
 
 	// page and host name
 	/** @var string */
@@ -145,12 +157,13 @@ class Logging
 	];
 
 	/**
-	 * Init logger
+	 * MARK: Init logger
 	 *
 	 * options array layout
 	 * - log_folder:
 	 * - log_file_id / file_id (will be deprecated):
 	 * - log_level:
+	 * - error_log_write_level: at what level we write to error_log
 	 *
 	 * - log_per_run:
 	 * - log_per_date: (was print_file_date)
@@ -172,6 +185,8 @@ class Logging
 
 		// set log level
 		$this->initLogLevel();
+		// set error log write level
+		$this->initErrorLogWriteLevel();
 		// set log folder from options
 		$this->initLogFolder();
 		// set per run UID for logging
@@ -190,8 +205,10 @@ class Logging
 	// PRIVATE METHODS
 	// *********************************************************************
 
+	// MARK: options check
+
 	/**
-	 * Undocumented function
+	 * validate options
 	 *
 	 * @param  array<mixed> $options
 	 * @return bool
@@ -263,6 +280,8 @@ class Logging
 		return true;
 	}
 
+	// MARK: init log elvels
+
 	/**
 	 * init log level, just a wrapper to auto set from options
 	 *
@@ -280,6 +299,24 @@ class Logging
 		$this->setLoggingLevel($this->options['log_level']);
 	}
 
+	/**
+	 * init error log write level
+	 *
+	 * @return void
+	 */
+	private function initErrorLogWriteLevel()
+	{
+		if (
+			empty($this->options['error_log_write_level']) ||
+			!$this->options['error_log_write_level'] instanceof Level
+		) {
+			$this->options['error_log_write_level'] = Level::Emergency;
+		}
+		$this->setErrorLogWriteLevel($this->options['error_log_write_level']);
+	}
+
+	// MARK: set log folder
+
 	/**
 	 * Set the log folder
 	 * If folder is not writeable the script will throw an E_USER_ERROR
@@ -321,6 +358,8 @@ class Logging
 		return $status;
 	}
 
+	// MARK: set host name
+
 	/**
 	 * Set the hostname and port
 	 * If port is not defaul 80 it will be added to the host name
@@ -337,6 +376,8 @@ class Logging
 		}
 	}
 
+	// MARK: set log file id (file)
+
 	/**
 	 * set log file prefix id
 	 *
@@ -395,6 +436,8 @@ class Logging
 		return $status;
 	}
 
+	// MARK init log flags and levels
+
 	/**
 	 * set flags from options and option flags connection internal settings
 	 *
@@ -423,6 +466,19 @@ class Logging
 		return $this->log_level->includes($level);
 	}
 
+	/**
+	 * Checks that given level is matchins error_log write level
+	 *
+	 * @param  Level $level
+	 * @return bool
+	 */
+	private function checkErrorLogWriteLevel(Level $level): bool
+	{
+		return $this->error_log_write_level->includes($level);
+	}
+
+	// MARK: build log ifle name
+
 	/**
 	 * Build the file name for writing
 	 *
@@ -490,6 +546,8 @@ class Logging
 		return $fn;
 	}
 
+	// MARK: master write log to file
+
 	/**
 	 * writes error msg data to file for current level
 	 *
@@ -507,6 +565,10 @@ class Logging
 		if (!$this->checkLogLevel($level)) {
 			return false;
 		}
+		// if we match level then write to error_log
+		if ($this->checkErrorLogWriteLevel($level)) {
+			error_log((string)$message);
+		}
 
 		// build logging file name
 		// fn is log folder + file name
@@ -531,6 +593,8 @@ class Logging
 		return true;
 	}
 
+	// MARK: master prepare log
+
 	/**
 	 * Prepare the log message with all needed info blocks:
 	 * [timestamp] [host name] [file path + file::row number] [running uid] {class::/->method}
@@ -610,6 +674,7 @@ class Logging
 	// PUBLIC STATIC METHJODS
 	// *********************************************************************
 
+	// MARK: set log level
 	/**
 	 * set the log level
 	 *
@@ -670,7 +735,7 @@ class Logging
 
 	// **** GET/SETTER
 
-	// log level set and get
+	// MARK: log level
 
 	/**
 	 * set new log level
@@ -705,7 +770,30 @@ class Logging
 		);
 	}
 
-	// log file id set (file name prefix)
+	// MARK: error log write level
+
+	/**
+	 * set the error_log write level
+	 *
+	 * @param  string|int|Level $level
+	 * @return void
+	 */
+	public function setErrorLogWriteLevel(string|int|Level $level): void
+	{
+		$this->error_log_write_level = $this->processLogLevel($level);
+	}
+
+	/**
+	 * get the current level for error_log write
+	 *
+	 * @return Level
+	 */
+	public function getErrorLogWriteLevel(): Level
+	{
+		return $this->error_log_write_level;
+	}
+
+	// MARK: log file id set (file name prefix)
 
 	/**
 	 * sets the internal log file prefix id
@@ -733,7 +821,7 @@ class Logging
 		return $this->log_file_id;
 	}
 
-	// log unique id set (for per run)
+	// MARK: log unique id set (for per run)
 
 	/**
 	 * Sets a unique id based on current date (y/m/d, h:i:s) and a unique id (8 chars)
@@ -768,7 +856,7 @@ class Logging
 		return $this->log_file_unique_id;
 	}
 
-	// general log date
+	// MARK: general log date
 
 	/**
 	 * set the log file date to Y-m-d
@@ -791,7 +879,7 @@ class Logging
 		return $this->log_file_date;
 	}
 
-	// general flag set
+	// MARK: general flag set
 
 	/**
 	 * set one of the basic flags
@@ -846,7 +934,7 @@ class Logging
 		return $this->log_flags;
 	}
 
-	// log folder/file
+	// MARK: log folder/file
 
 	/**
 	 * set new log folder, check that folder is writeable
@@ -890,7 +978,7 @@ class Logging
 		return $this->log_file_name;
 	}
 
-	// max log file size
+	// MARK: max log file size
 
 	/**
 	 * set mag log file size
@@ -921,7 +1009,7 @@ class Logging
 	}
 
 	// *********************************************************************
-	// OPTIONS CALLS
+	// MARK: OPTIONS CALLS
 	// *********************************************************************
 
 	/**
@@ -939,6 +1027,8 @@ class Logging
 	// MAIN CALLS
 	// *********************************************************************
 
+	// MARK: main log call
+
 	/**
 	 * Commong log interface
 	 *
@@ -976,7 +1066,7 @@ class Logging
 	}
 
 	/**
-	 * DEBUG: 100
+	 * MARK: DEBUG: 100
 	 *
 	 * write debug data to error_msg array
 	 *
@@ -1008,7 +1098,7 @@ class Logging
 	}
 
 	/**
-	 * INFO: 200
+	 * MARK: INFO: 200
 	 *
 	 * @param  string|Stringable $message
 	 * @param  mixed[] $context
@@ -1027,7 +1117,7 @@ class Logging
 	}
 
 	/**
-	 * NOTICE: 250
+	 * MARK: NOTICE: 250
 	 *
 	 * @param  string|Stringable $message
 	 * @param  mixed[] $context
@@ -1046,7 +1136,7 @@ class Logging
 	}
 
 	/**
-	 * WARNING: 300
+	 * MARK: WARNING: 300
 	 *
 	 * @param  string|Stringable $message
 	 * @param  mixed[] $context
@@ -1065,7 +1155,7 @@ class Logging
 	}
 
 	/**
-	 * ERROR: 400
+	 * MARK: ERROR: 400
 	 *
 	 * @param  string|Stringable $message
 	 * @param  mixed[] $context
@@ -1084,7 +1174,7 @@ class Logging
 	}
 
 	/**
-	 * CTRITICAL: 500
+	 * MARK: CTRITICAL: 500
 	 *
 	 * @param  string|Stringable $message
 	 * @param  mixed[] $context
@@ -1103,7 +1193,7 @@ class Logging
 	}
 
 	/**
-	 * ALERT: 550
+	 * MARK: ALERT: 550
 	 *
 	 * @param  string|Stringable $message
 	 * @param  mixed[] $context
@@ -1122,7 +1212,7 @@ class Logging
 	}
 
 	/**
-	 * EMERGENCY: 600
+	 * MARK: EMERGENCY: 600
 	 *
 	 * @param  string|Stringable $message
 	 * @param  mixed[] $context
@@ -1141,7 +1231,7 @@ class Logging
 	}
 
 	// *********************************************************************
-	// DEPRECATED SUPPORT CALLS
+	// MARK: DEPRECATED SUPPORT CALLS
 	// *********************************************************************
 
 	// legacy, but there are too many implemented
@@ -1199,7 +1289,7 @@ class Logging
 	}
 
 	// *********************************************************************
-	// DEPRECATED METHODS
+	// MARK: DEPRECATED METHODS
 	// *********************************************************************
 
 	/**
@@ -1365,7 +1455,7 @@ class Logging
 	}
 
 	// *********************************************************************
-	// DEBUG METHODS
+	// MARK: DEBUG METHODS
 	// *********************************************************************
 
 	/**
@@ -1398,6 +1488,7 @@ class Logging
 		}
 		// back to options level
 		$this->initLogLevel();
+		$this->initErrorLogWriteLevel();
 		print "OPT set level: " . $this->getLoggingLevel()->getName() . "<br>";
 	}
 }

src/UrlRequests/Curl.php

@@ -599,7 +599,7 @@ class Curl implements Interface\RequestsInterface
 		// for post we set POST option
 		if ($type == "post") {
 			curl_setopt($handle, CURLOPT_POST, true);
-		} elseif (!empty($type) && in_array($type, self::CUSTOM_REQUESTS)) {
+		} elseif (in_array($type, self::CUSTOM_REQUESTS)) {
 			curl_setopt($handle, CURLOPT_CUSTOMREQUEST, strtoupper($type));
 		}
 		// set body data if not null, will send empty [] for empty data

test/phpunit/Combined/CoreLibsCombinedArrayHandlerFindArraysMissingKeyTest.php

@@ -0,0 +1,404 @@
+<?php
+
+// This code was created by Claude Sonnet 4
+
+declare(strict_types=1);
+
+namespace tests;
+
+use PHPUnit\Framework\TestCase;
+use CoreLibs\Combined\ArrayHandler;
+
+class CoreLibsCombinedArrayHandlerFindArraysMissingKeyTest extends TestCase
+{
+	private const DATA_SEPARATOR = ':'; // Updated to match your class's separator
+
+	/**
+	 * Test finding missing single key when searching by value without specific key
+	 */
+	public function testFindMissingSingleKeyWithValueSearch()
+	{
+		$array = [
+			'item1' => [
+				'name' => 'John',
+				'age' => 25
+				// missing 'email' key
+			],
+			'item2' => [
+				'name' => 'Jane',
+				'age' => 30,
+				'email' => 'jane@example.com'
+			],
+			'item3' => [
+				'name' => 'John', // same value as item1
+				'age' => 35,
+				'email' => 'john2@example.com'
+			]
+		];
+
+		$result = ArrayHandler::findArraysMissingKey($array, 'John', 'email');
+
+		$this->assertCount(1, $result);
+		$this->assertEquals($array['item1'], $result[0]['content']);
+		$this->assertEquals('item1', $result[0]['path']);
+		$this->assertEquals(['email'], $result[0]['missing_key']);
+	}
+
+	/**
+	 * Test finding missing single key when searching by specific key-value pair
+	 */
+	public function testFindMissingSingleKeyWithKeyValueSearch()
+	{
+		$array = [
+			'user1' => [
+				'id' => 1,
+				'name' => 'Alice'
+				// missing 'status' key
+			],
+			'user2' => [
+				'id' => 2,
+				'name' => 'Bob',
+				'status' => 'active'
+			],
+			'user3' => [
+				'id' => 1, // same id as user1
+				'name' => 'Charlie',
+				'status' => 'inactive'
+			]
+		];
+
+		$result = ArrayHandler::findArraysMissingKey($array, 1, 'status', 'id');
+
+		$this->assertCount(1, $result);
+		$this->assertEquals($array['user1'], $result[0]['content']);
+		$this->assertEquals('user1', $result[0]['path']);
+		$this->assertEquals(['status'], $result[0]['missing_key']);
+	}
+
+	/**
+	 * Test finding missing multiple keys
+	 */
+	public function testFindMissingMultipleKeys()
+	{
+		$array = [
+			'record1' => [
+				'name' => 'Test',
+				'value' => 100
+				// missing both 'date' and 'status' keys
+			],
+			'record2' => [
+				'name' => 'Test',
+				'value' => 200,
+				'date' => '2023-01-01'
+				// missing 'status' key
+			],
+			'record3' => [
+				'name' => 'Test',
+				'value' => 300,
+				'date' => '2023-01-02',
+				'status' => 'complete'
+			]
+		];
+
+		$result = ArrayHandler::findArraysMissingKey($array, 'Test', ['date', 'status']);
+
+		$this->assertCount(2, $result);
+
+		// First result should be record1 missing both keys
+		$this->assertEquals($array['record1'], $result[0]['content']);
+		$this->assertEquals('record1', $result[0]['path']);
+		$this->assertContains('date', $result[0]['missing_key']);
+		$this->assertContains('status', $result[0]['missing_key']);
+		$this->assertCount(2, $result[0]['missing_key']);
+
+		// Second result should be record2 missing status key
+		$this->assertEquals($array['record2'], $result[1]['content']);
+		$this->assertEquals('record2', $result[1]['path']);
+		$this->assertEquals(['status'], $result[1]['missing_key']);
+	}
+
+	/**
+	 * Test with nested arrays
+	 */
+	public function testFindMissingKeyInNestedArrays()
+	{
+		$array = [
+			'section1' => [
+				'items' => [
+					'item1' => [
+						'name' => 'Product A',
+						'price' => 99.99
+						// missing 'category' key
+					],
+					'item2' => [
+						'name' => 'Product B',
+						'price' => 149.99,
+						'category' => 'electronics'
+					]
+				]
+			],
+			'section2' => [
+				'data' => [
+					'name' => 'Product A', // same name as nested item
+					'category' => 'books'
+				]
+			]
+		];
+
+		$result = ArrayHandler::findArraysMissingKey($array, 'Product A', 'category');
+
+		$this->assertCount(1, $result);
+		$this->assertEquals($array['section1']['items']['item1'], $result[0]['content']);
+		$this->assertEquals('section1:items:item1', $result[0]['path']);
+		$this->assertEquals(['category'], $result[0]['missing_key']);
+	}
+
+	/**
+	 * Test when no arrays are missing the required key
+	 */
+	public function testNoMissingKeys()
+	{
+		$array = [
+			'item1' => [
+				'name' => 'John',
+				'email' => 'john@example.com'
+			],
+			'item2' => [
+				'name' => 'Jane',
+				'email' => 'jane@example.com'
+			]
+		];
+
+		$result = ArrayHandler::findArraysMissingKey($array, 'John', 'email');
+
+		$this->assertEmpty($result);
+	}
+
+	/**
+	 * Test when search value is not found in any array
+	 */
+	public function testSearchValueNotFound()
+	{
+		$array = [
+			'item1' => [
+				'name' => 'John',
+				'age' => 25
+			],
+			'item2' => [
+				'name' => 'Jane',
+				'age' => 30
+			]
+		];
+
+		$result = ArrayHandler::findArraysMissingKey($array, 'Bob', 'email');
+
+		$this->assertEmpty($result);
+	}
+
+	/**
+	 * Test with different data types for search value
+	 */
+	public function testDifferentSearchValueTypes()
+	{
+		$array = [
+			'item1' => [
+				'active' => true,
+				'count' => 5
+				// missing 'label' key
+			],
+			'item2' => [
+				'active' => false,
+				'count' => 10,
+				'label' => 'test'
+			],
+			'item3' => [
+				'active' => true, // same boolean as item1
+				'count' => 15,
+				'label' => 'another'
+			]
+		];
+
+		// Test with boolean
+		$result = ArrayHandler::findArraysMissingKey($array, true, 'label', 'active');
+		$this->assertCount(1, $result);
+		$this->assertEquals('item1', $result[0]['path']);
+
+		// Test with integer
+		$result = ArrayHandler::findArraysMissingKey($array, 5, 'label', 'count');
+		$this->assertCount(1, $result);
+		$this->assertEquals('item1', $result[0]['path']);
+	}
+
+	/**
+	 * Test with empty array
+	 */
+	public function testEmptyArray()
+	{
+		$array = [];
+
+		$result = ArrayHandler::findArraysMissingKey($array, 'test', 'key');
+
+		$this->assertEmpty($result);
+	}
+
+	/**
+	 * Test with array containing non-array values
+	 */
+	public function testMixedArrayTypes()
+	{
+		$array = [
+			'string_value' => 'hello',
+			'numeric_value' => 123,
+			'array_value' => [
+				'name' => 'test',
+				// missing 'type' key
+			],
+			'another_array' => [
+				'name' => 'test',
+				'type' => 'example'
+			]
+		];
+
+		$result = ArrayHandler::findArraysMissingKey($array, 'test', 'type');
+
+		$this->assertCount(1, $result);
+		$this->assertEquals($array['array_value'], $result[0]['content']);
+		$this->assertEquals('array_value', $result[0]['path']);
+		$this->assertEquals(['type'], $result[0]['missing_key']);
+	}
+
+	/**
+	 * Test path building with deeper nesting
+	 */
+	public function testDeepNestingPathBuilding()
+	{
+		$array = [
+			'level1' => [
+				'level2' => [
+					'level3' => [
+						'items' => [
+							'target_item' => [
+								'name' => 'deep_test',
+								// missing 'required_field'
+							]
+						]
+					]
+				]
+			]
+		];
+
+		$result = ArrayHandler::findArraysMissingKey($array, 'deep_test', 'required_field');
+
+		$this->assertCount(1, $result);
+		$this->assertEquals('level1:level2:level3:items:target_item', $result[0]['path']);
+	}
+
+	/**
+	 * Test with custom path separator
+	 */
+	public function testCustomPathSeparator()
+	{
+		$array = [
+			'level1' => [
+				'level2' => [
+					'item' => [
+						'name' => 'test',
+						// missing 'type' key
+					]
+				]
+			]
+		];
+
+		$result = ArrayHandler::findArraysMissingKey($array, 'test', 'type', null, '/');
+
+		$this->assertCount(1, $result);
+		$this->assertEquals('level1/level2/item', $result[0]['path']);
+	}
+
+	/**
+	 * Test default path separator behavior
+	 */
+	public function testDefaultPathSeparator()
+	{
+		$array = [
+			'parent' => [
+				'child' => [
+					'name' => 'test',
+					// missing 'value' key
+				]
+			]
+		];
+
+		// Using default separator (should be ':')
+		$result = ArrayHandler::findArraysMissingKey($array, 'test', 'value');
+
+		$this->assertCount(1, $result);
+		$this->assertEquals('parent:child', $result[0]['path']);
+	}
+
+	/**
+	 * Test different path separators don't affect search logic
+	 */
+	public function testPathSeparatorDoesNotAffectSearchLogic()
+	{
+		$array = [
+			'section' => [
+				'data' => [
+					'id' => 123,
+					'name' => 'item'
+					// missing 'status'
+				]
+			]
+		];
+
+		// Test with different separators - results should be identical except for path
+		$result1 = ArrayHandler::findArraysMissingKey($array, 123, 'status', 'id', ':');
+		$result2 = ArrayHandler::findArraysMissingKey($array, 123, 'status', 'id', '.');
+		$result3 = ArrayHandler::findArraysMissingKey($array, 123, 'status', 'id', '/');
+
+		$this->assertCount(1, $result1);
+		$this->assertCount(1, $result2);
+		$this->assertCount(1, $result3);
+
+		// Content and missing_key should be the same
+		$this->assertEquals($result1[0]['content'], $result2[0]['content']);
+		$this->assertEquals($result1[0]['content'], $result3[0]['content']);
+		$this->assertEquals($result1[0]['missing_key'], $result2[0]['missing_key']);
+		$this->assertEquals($result1[0]['missing_key'], $result3[0]['missing_key']);
+
+		// Paths should be different based on separator
+		$this->assertEquals('section:data', $result1[0]['path']);
+		$this->assertEquals('section.data', $result2[0]['path']);
+		$this->assertEquals('section/data', $result3[0]['path']);
+	}
+
+	/**
+	 * test type checking
+	 */
+	public function testStrictTypeChecking()
+	{
+		$array = [
+			'item1' => [
+				'id' => '123', // string
+				'name' => 'test'
+				// missing 'status'
+			],
+			'item2' => [
+				'id' => 123, // integer
+				'name' => 'test2',
+				'status' => 'active'
+			]
+		];
+
+		// Search for integer 123 - should only match item2
+		$result = ArrayHandler::findArraysMissingKey($array, 123, 'status', 'id');
+		$this->assertEmpty($result); // item2 has the status key
+
+		// Search for string '123' - should only match item1
+		$result = ArrayHandler::findArraysMissingKey($array, '123', 'status', 'id');
+		$this->assertCount(1, $result);
+		$this->assertEquals('item1', $result[0]['path']);
+	}
+}
+
+// __END__

test/phpunit/Combined/CoreLibsCombinedArrayHandlerKsortArrayTest.php

@@ -0,0 +1,333 @@
+<?php
+
+// This code was created by Claude Sonnet 4
+// modification for value checks with assertEqualsCanonicalizing
+
+declare(strict_types=1);
+
+namespace tests;
+
+use PHPUnit\Framework\TestCase;
+use CoreLibs\Combined\ArrayHandler;
+
+class CoreLibsCombinedArrayHandlerKsortArrayTest extends TestCase
+{
+	/**
+	 * Test basic ascending sort (default behavior)
+	 */
+	public function testKsortArrayBasicAscending(): void
+	{
+		$input = [
+			'zebra' => 'value1',
+			'apple' => 'value2',
+			'banana' => 'value3',
+			'cherry' => 'value4'
+		];
+
+		$expected = [
+			'apple' => 'value2',
+			'banana' => 'value3',
+			'cherry' => 'value4',
+			'zebra' => 'value1'
+		];
+
+		$result = ArrayHandler::ksortArray($input);
+		$this->assertEquals($expected, $result);
+		$this->assertEquals(array_keys($expected), array_keys($result));
+	}
+
+	/**
+	 * Test descending sort with reverse=true
+	 */
+	public function testKsortArrayDescending(): void
+	{
+		$input = [
+			'zebra' => 'value1',
+			'apple' => 'value2',
+			'banana' => 'value3',
+			'cherry' => 'value4'
+		];
+
+		$expected = [
+			'zebra' => 'value1',
+			'cherry' => 'value4',
+			'banana' => 'value3',
+			'apple' => 'value2'
+		];
+
+		$result = ArrayHandler::ksortArray($input, false, true);
+		$this->assertEquals($expected, $result);
+		$this->assertEquals(array_keys($expected), array_keys($result));
+	}
+
+	/**
+	 * Test case-insensitive ascending sort
+	 */
+	public function testKsortArrayCaseInsensitiveAscending(): void
+	{
+		$input = [
+			'Zebra' => 'value1',
+			'apple' => 'value2',
+			'Banana' => 'value3',
+			'cherry' => 'value4'
+		];
+
+		$expected = [
+			'apple' => 'value2',
+			'Banana' => 'value3',
+			'cherry' => 'value4',
+			'Zebra' => 'value1'
+		];
+
+		$result = ArrayHandler::ksortArray($input, true);
+		$this->assertEquals($expected, $result);
+		$this->assertEquals(array_keys($expected), array_keys($result));
+	}
+
+	/**
+	 * Test case-insensitive descending sort
+	 */
+	public function testKsortArrayCaseInsensitiveDescending(): void
+	{
+		$input = [
+			'Zebra' => 'value1',
+			'apple' => 'value2',
+			'Banana' => 'value3',
+			'cherry' => 'value4'
+		];
+
+		$expected = [
+			'Zebra' => 'value1',
+			'cherry' => 'value4',
+			'Banana' => 'value3',
+			'apple' => 'value2'
+		];
+
+		$result = ArrayHandler::ksortArray($input, true, true);
+		$this->assertEquals($expected, $result);
+		$this->assertEquals(array_keys($expected), array_keys($result));
+	}
+
+	/**
+	 * Test with mixed case keys to verify case sensitivity behavior
+	 */
+	public function testKsortArrayCaseSensitivityComparison(): void
+	{
+		$input = [
+			'B' => 'value1',
+			'a' => 'value2',
+			'C' => 'value3',
+			'b' => 'value4'
+		];
+
+		// Case-sensitive sort (uppercase comes before lowercase in ASCII)
+		$expectedCaseSensitive = [
+			'B' => 'value1',
+			'C' => 'value3',
+			'a' => 'value2',
+			'b' => 'value4'
+		];
+
+		// Case-insensitive sort
+		$expectedCaseInsensitive = [
+			'a' => 'value2',
+			'B' => 'value1',
+			'b' => 'value4',
+			'C' => 'value3'
+		];
+
+		$resultCaseSensitive = ArrayHandler::ksortArray($input, false);
+		$resultCaseInsensitive = ArrayHandler::ksortArray($input, true);
+
+		$this->assertEquals($expectedCaseSensitive, $resultCaseSensitive);
+		$this->assertEquals($expectedCaseInsensitive, $resultCaseInsensitive);
+	}
+
+	/**
+	 * Test with numeric string keys
+	 */
+	public function testKsortArrayNumericStringKeys(): void
+	{
+		$input = [
+			'10' => 'value1',
+			'2' => 'value2',
+			'1' => 'value3',
+			'20' => 'value4'
+		];
+
+		// String comparison, not numeric
+		$expected = [
+			'1' => 'value3',
+			'10' => 'value1',
+			'2' => 'value2',
+			'20' => 'value4'
+		];
+
+		$result = ArrayHandler::ksortArray($input);
+		$this->assertEquals($expected, $result);
+	}
+
+	/**
+	 * Test with special characters in keys
+	 */
+	public function testKsortArraySpecialCharacters(): void
+	{
+		$input = [
+			'key_with_underscore' => 'value1',
+			'key-with-dash' => 'value2',
+			'key.with.dot' => 'value3',
+			'key with space' => 'value4',
+			'keyWithCamelCase' => 'value5'
+		];
+
+		$result = ArrayHandler::ksortArray($input);
+
+		// Verify it doesn't throw an error and maintains all keys
+		$this->assertCount(5, $result);
+		$this->assertArrayHasKey('key_with_underscore', $result);
+		$this->assertArrayHasKey('key-with-dash', $result);
+		$this->assertArrayHasKey('key.with.dot', $result);
+		$this->assertArrayHasKey('key with space', $result);
+		$this->assertArrayHasKey('keyWithCamelCase', $result);
+	}
+
+	/**
+	 * Test with empty array
+	 */
+	public function testKsortArrayEmpty(): void
+	{
+		$input = [];
+		$result = ArrayHandler::ksortArray($input);
+		$this->assertEquals([], $result);
+		$this->assertIsArray($result);
+	}
+
+	/**
+	 * Test with single element array
+	 */
+	public function testKsortArraySingleElement(): void
+	{
+		$input = ['onlykey' => 'onlyvalue'];
+		$result = ArrayHandler::ksortArray($input);
+		$this->assertEquals($input, $result);
+	}
+
+	/**
+	 * Test that original array is not modified (function returns new array)
+	 */
+	public function testKsortArrayDoesNotModifyOriginal(): void
+	{
+		$original = [
+			'zebra' => 'value1',
+			'apple' => 'value2',
+			'banana' => 'value3'
+		];
+
+		$originalCopy = $original; // Keep a copy for comparison
+		$result = ArrayHandler::ksortArray($original);
+
+		// Original array should remain unchanged
+		$this->assertEquals($originalCopy, $original);
+		$this->assertNotEquals(array_keys($original), array_keys($result));
+	}
+
+	/**
+	 * Test with complex mixed data types as values
+	 */
+	public function testKsortArrayMixedValueTypes(): void
+	{
+		$input = [
+			'string_key' => 'string_value',
+			'array_key' => ['nested', 'array'],
+			'int_key' => 42,
+			'bool_key' => true,
+			'null_key' => null
+		];
+
+		$result = ArrayHandler::ksortArray($input);
+
+		// Check that all keys are preserved and sorted
+		$expectedKeys = ['array_key', 'bool_key', 'int_key', 'null_key', 'string_key'];
+		$this->assertEquals($expectedKeys, array_keys($result));
+
+		// Check that values are preserved correctly
+		$this->assertEquals('string_value', $result['string_key']);
+		$this->assertEquals(['nested', 'array'], $result['array_key']);
+		$this->assertEquals(42, $result['int_key']);
+		$this->assertTrue($result['bool_key']);
+		$this->assertNull($result['null_key']);
+	}
+
+	/**
+	 * Test all parameter combinations
+	 */
+	public function testKsortArrayAllParameterCombinations(): void
+	{
+		$input = [
+			'Delta' => 'value1',
+			'alpha' => 'value2',
+			'Charlie' => 'value3',
+			'bravo' => 'value4'
+		];
+
+		// Test all 4 combinations
+		$result1 = ArrayHandler::ksortArray($input, false, false); // default
+		$result2 = ArrayHandler::ksortArray($input, false, true);  // reverse only
+		$result3 = ArrayHandler::ksortArray($input, true, false);  // lowercase only
+		$result4 = ArrayHandler::ksortArray($input, true, true);   // both
+
+		// Each should produce different ordering
+		$this->assertNotEquals(array_keys($result1), array_keys($result2));
+		$this->assertNotEquals(array_keys($result1), array_keys($result3));
+		$this->assertNotEquals(array_keys($result1), array_keys($result4));
+		$this->assertNotEquals(array_keys($result2), array_keys($result3));
+		$this->assertNotEquals(array_keys($result2), array_keys($result4));
+		$this->assertNotEquals(array_keys($result3), array_keys($result4));
+
+		// But all should have same keys and values, just different order
+		$this->assertEqualsCanonicalizing(array_values($input), array_values($result1));
+		$this->assertEqualsCanonicalizing(array_values($input), array_values($result2));
+		$this->assertEqualsCanonicalizing(array_values($input), array_values($result3));
+		$this->assertEqualsCanonicalizing(array_values($input), array_values($result4));
+	}
+
+	/**
+	 * Data provider for comprehensive testing
+	 */
+	public function sortingParametersProvider(): array
+	{
+		return [
+			'default' => [false, false],
+			'reverse' => [false, true],
+			'lowercase' => [true, false],
+			'lowercase_reverse' => [true, true],
+		];
+	}
+
+	/**
+	 * Test that function works with all parameter combinations using data provider
+	 *
+	 * @dataProvider sortingParametersProvider
+	 */
+	public function testKsortArrayWithDataProvider(bool $lowerCase, bool $reverse): void
+	{
+		$input = [
+			'Zebra' => 'animal1',
+			'apple' => 'fruit1',
+			'Banana' => 'fruit2',
+			'cat' => 'animal2'
+		];
+
+		$result = ArrayHandler::ksortArray($input, $lowerCase, $reverse);
+
+		// Basic assertions that apply to all combinations
+		$this->assertIsArray($result);
+		$this->assertCount(4, $result);
+		$this->assertArrayHasKey('Zebra', $result);
+		$this->assertArrayHasKey('apple', $result);
+		$this->assertArrayHasKey('Banana', $result);
+		$this->assertArrayHasKey('cat', $result);
+	}
+}
+
+// __END__

test/phpunit/Combined/CoreLibsCombinedArrayHandlerSelectArrayFromOptionTest.php

@@ -0,0 +1,383 @@
+<?php
+
+// created by Claude Sonnet 4
+
+// testRecursiveSearchWithFlatResult had wrong retunr count
+
+declare(strict_types=1);
+
+namespace tests;
+
+use PHPUnit\Framework\TestCase;
+use CoreLibs\Combined\ArrayHandler;
+
+class CoreLibsCombinedArrayHandlerSelectArrayFromOptionTest extends TestCase
+{
+	private array $testData;
+	private array $nestedTestData;
+
+	protected function setUp(): void
+	{
+		$this->testData = [
+			'item1' => [
+				'name' => 'John',
+				'age' => 25,
+				'status' => 'active',
+				'score' => 85.5
+			],
+			'item2' => [
+				'name' => 'jane',
+				'age' => 30,
+				'status' => 'inactive',
+				'score' => 92.0
+			],
+			'item3' => [
+				'name' => 'Bob',
+				'age' => 25,
+				'status' => 'active',
+				'score' => 78.3
+			],
+			'item4' => [
+				'name' => 'Alice',
+				'age' => 35,
+				'status' => 'pending',
+				'score' => 88.7
+			]
+		];
+
+		$this->nestedTestData = [
+			'level1_a' => [
+				'name' => 'Level1A',
+				'type' => 'parent',
+				'children' => [
+					'child1' => [
+						'name' => 'Child1',
+						'type' => 'child',
+						'active' => true
+					],
+					'child2' => [
+						'name' => 'Child2',
+						'type' => 'child',
+						'active' => false
+					]
+				]
+			],
+			'level1_b' => [
+				'name' => 'Level1B',
+				'type' => 'parent',
+				'children' => [
+					'child3' => [
+						'name' => 'Child3',
+						'type' => 'child',
+						'active' => true,
+						'nested' => [
+							'deep1' => [
+								'name' => 'Deep1',
+								'type' => 'deep',
+								'active' => true
+							]
+						]
+					]
+				]
+			],
+			'item5' => [
+				'name' => 'Direct',
+				'type' => 'child',
+				'active' => false
+			]
+		];
+	}
+
+	public function testEmptyArrayReturnsEmpty(): void
+	{
+		$result = ArrayHandler::selectArrayFromOption([], 'name', 'John');
+		$this->assertEmpty($result);
+	}
+
+	public function testBasicStringSearch(): void
+	{
+		$result = ArrayHandler::selectArrayFromOption($this->testData, 'name', 'John');
+
+		$this->assertCount(1, $result);
+		$this->assertArrayHasKey('item1', $result);
+		$this->assertEquals('John', $result['item1']['name']);
+	}
+
+	public function testBasicIntegerSearch(): void
+	{
+		$result = ArrayHandler::selectArrayFromOption($this->testData, 'age', 25);
+
+		$this->assertCount(2, $result);
+		$this->assertArrayHasKey('item1', $result);
+		$this->assertArrayHasKey('item3', $result);
+	}
+
+	public function testBasicFloatSearch(): void
+	{
+		$result = ArrayHandler::selectArrayFromOption($this->testData, 'score', 85.5);
+
+		$this->assertCount(1, $result);
+		$this->assertArrayHasKey('item1', $result);
+		$this->assertEquals(85.5, $result['item1']['score']);
+	}
+
+	public function testBasicBooleanSearch(): void
+	{
+		$data = [
+			'item1' => ['enabled' => true, 'name' => 'Test1'],
+			'item2' => ['enabled' => false, 'name' => 'Test2'],
+			'item3' => ['enabled' => true, 'name' => 'Test3']
+		];
+
+		$result = ArrayHandler::selectArrayFromOption($data, 'enabled', true);
+
+		$this->assertCount(2, $result);
+		$this->assertArrayHasKey('item1', $result);
+		$this->assertArrayHasKey('item3', $result);
+	}
+
+	public function testStrictComparison(): void
+	{
+		$data = [
+			'item1' => ['value' => '25', 'name' => 'String25'],
+			'item2' => ['value' => 25, 'name' => 'Int25'],
+			'item3' => ['value' => 25.0, 'name' => 'Float25']
+		];
+
+		// Non-strict should match all
+		$nonStrictResult = ArrayHandler::selectArrayFromOption($data, 'value', 25, false);
+		$this->assertCount(3, $nonStrictResult);
+
+		// Strict should only match exact type
+		$strictResult = ArrayHandler::selectArrayFromOption($data, 'value', 25, true);
+		$this->assertCount(1, $strictResult);
+		$this->assertArrayHasKey('item2', $strictResult);
+	}
+
+	public function testCaseInsensitiveSearch(): void
+	{
+		$result = ArrayHandler::selectArrayFromOption($this->testData, 'name', 'JANE', false, true);
+
+		$this->assertCount(1, $result);
+		$this->assertArrayHasKey('item2', $result);
+		$this->assertEquals('jane', $result['item2']['name']);
+	}
+
+	public function testCaseSensitiveSearch(): void
+	{
+		$result = ArrayHandler::selectArrayFromOption($this->testData, 'name', 'JANE', false, false);
+
+		$this->assertEmpty($result);
+	}
+
+	public function testRecursiveSearchWithFlatResult(): void
+	{
+		$result = ArrayHandler::selectArrayFromOption(
+			$this->nestedTestData,
+			'type',
+			'child',
+			false,
+			false,
+			true,
+			true,
+			':*'
+		);
+
+		$this->assertCount(4, $result);
+		$this->assertArrayHasKey('level1_a:*children:*child1', $result);
+		$this->assertArrayHasKey('level1_a:*children:*child2', $result);
+		$this->assertArrayHasKey('level1_b:*children:*child3', $result);
+		$this->assertArrayHasKey('item5', $result);
+	}
+
+	public function testRecursiveSearchWithNestedResult(): void
+	{
+		$result = ArrayHandler::selectArrayFromOption(
+			$this->nestedTestData,
+			'type',
+			'child',
+			false,
+			false,
+			true,
+			false
+		);
+
+		$this->assertCount(3, $result);
+		$this->assertArrayHasKey('level1_a', $result);
+		$this->assertArrayHasKey('level1_b', $result);
+		$this->assertArrayHasKey('item5', $result);
+
+		// Check nested structure is preserved
+		$this->assertArrayHasKey('children', $result['level1_a']);
+		$this->assertArrayHasKey('child1', $result['level1_a']['children']);
+		$this->assertArrayHasKey('child2', $result['level1_a']['children']);
+	}
+
+	public function testRecursiveSearchDeepNesting(): void
+	{
+		$result = ArrayHandler::selectArrayFromOption(
+			$this->nestedTestData,
+			'type',
+			'deep',
+			false,
+			false,
+			true,
+			true,
+			':*'
+		);
+
+		$this->assertCount(1, $result);
+		$this->assertArrayHasKey('level1_b:*children:*child3:*nested:*deep1', $result);
+		$this->assertEquals('Deep1', $result['level1_b:*children:*child3:*nested:*deep1']['name']);
+	}
+
+	public function testCustomFlatSeparator(): void
+	{
+		$result = ArrayHandler::selectArrayFromOption(
+			$this->nestedTestData,
+			'type',
+			'child',
+			false,
+			false,
+			true,
+			true,
+			'|'
+		);
+
+		$this->assertArrayHasKey('level1_a|children|child1', $result);
+		$this->assertArrayHasKey('level1_a|children|child2', $result);
+		$this->assertArrayHasKey('level1_b|children|child3', $result);
+	}
+
+	public function testNonRecursiveSearch(): void
+	{
+		$result = ArrayHandler::selectArrayFromOption(
+			$this->nestedTestData,
+			'type',
+			'child',
+			false,
+			false,
+			false
+		);
+
+		// Should only find direct matches, not nested ones
+		$this->assertCount(1, $result);
+		$this->assertArrayHasKey('item5', $result);
+	}
+
+	public function testNoMatchesFound(): void
+	{
+		$result = ArrayHandler::selectArrayFromOption($this->testData, 'name', 'NonExistent');
+
+		$this->assertEmpty($result);
+	}
+
+	public function testMissingLookupKey(): void
+	{
+		$result = ArrayHandler::selectArrayFromOption($this->testData, 'nonexistent_key', 'value');
+
+		$this->assertEmpty($result);
+	}
+
+	public function testCombinedStrictAndCaseInsensitive(): void
+	{
+		$data = [
+			'item1' => ['name' => 'Test', 'id' => '123'],
+			'item2' => ['name' => 'test', 'id' => 123],
+			'item3' => ['name' => 'TEST', 'id' => '123']
+		];
+
+		// Case insensitive but strict type matching
+		$result = ArrayHandler::selectArrayFromOption($data, 'id', '123', true, true);
+
+		$this->assertCount(2, $result);
+		$this->assertArrayHasKey('item1', $result);
+		$this->assertArrayHasKey('item3', $result);
+	}
+
+	public function testBooleanWithCaseInsensitive(): void
+	{
+		$data = [
+			'item1' => ['active' => true, 'name' => 'Test1'],
+			'item2' => ['active' => false, 'name' => 'Test2']
+		];
+
+		// Case insensitive flag should not affect boolean comparison
+		$result = ArrayHandler::selectArrayFromOption($data, 'active', true, false, true);
+
+		$this->assertCount(1, $result);
+		$this->assertArrayHasKey('item1', $result);
+	}
+
+	public function testArrayWithNumericKeys(): void
+	{
+		$data = [
+			0 => ['name' => 'First', 'type' => 'test'],
+			1 => ['name' => 'Second', 'type' => 'test'],
+			2 => ['name' => 'Third', 'type' => 'other']
+		];
+
+		$result = ArrayHandler::selectArrayFromOption($data, 'type', 'test');
+
+		$this->assertCount(2, $result);
+		$this->assertArrayHasKey(0, $result);
+		$this->assertArrayHasKey(1, $result);
+	}
+
+	public function testRecursiveWithMixedKeyTypes(): void
+	{
+		$data = [
+			'string_key' => [
+				'name' => 'Parent',
+				'type' => 'parent',
+				0 => [
+					'name' => 'Child0',
+					'type' => 'child'
+				],
+				'child_key' => [
+					'name' => 'ChildKey',
+					'type' => 'child'
+				]
+			]
+		];
+
+		$result = ArrayHandler::selectArrayFromOption($data, 'type', 'child', false, false, true, true, ':*');
+
+		$this->assertCount(2, $result);
+		$this->assertArrayHasKey('string_key:*0', $result);
+		$this->assertArrayHasKey('string_key:*child_key', $result);
+	}
+
+	public function testAllParametersCombined(): void
+	{
+		$data = [
+			'parent1' => [
+				'name' => 'Parent1',
+				'status' => 'ACTIVE',
+				'children' => [
+					'child1' => [
+						'name' => 'Child1',
+						'status' => 'active'
+					]
+				]
+			]
+		];
+
+		$result = ArrayHandler::selectArrayFromOption(
+			$data,
+			'status',
+			'active',
+			false,      // not strict
+			true,       // case insensitive
+			true,       // recursive
+			true,       // flat result
+			'|'         // custom separator
+		);
+
+		$this->assertCount(2, $result);
+		$this->assertArrayHasKey('parent1', $result);
+		$this->assertArrayHasKey('parent1|children|child1', $result);
+	}
+}
+
+// __END__

test/phpunit/Combined/CoreLibsCombinedArrayHandlerSortArrayTest.php

@@ -0,0 +1,328 @@
+<?php
+
+// This code was created by Claude Sonnet 4
+
+declare(strict_types=1);
+
+namespace tests;
+
+use PHPUnit\Framework\TestCase;
+use CoreLibs\Combined\ArrayHandler;
+
+class CoreLibsCombinedArrayHandlerSortArrayTest extends TestCase
+{
+	/**
+	 * Test basic ascending sort without maintaining keys
+	 */
+	public function testBasicAscendingSort()
+	{
+		$input = [3, 1, 4, 1, 5, 9];
+		$expected = [1, 1, 3, 4, 5, 9];
+
+		$result = ArrayHandler::sortArray($input);
+
+		$this->assertEquals($expected, $result);
+		$this->assertEquals(array_keys($expected), array_keys($result));
+	}
+
+	/**
+	 * Test basic descending sort without maintaining keys
+	 */
+	public function testBasicDescendingSort()
+	{
+		$input = [3, 1, 4, 1, 5, 9];
+		$expected = [9, 5, 4, 3, 1, 1];
+
+		$result = ArrayHandler::sortArray($input, false, true);
+
+		$this->assertEquals($expected, $result);
+		$this->assertEquals(array_keys($expected), array_keys($result));
+	}
+
+	/**
+	 * Test ascending sort with key maintenance
+	 */
+	public function testAscendingSortWithKeyMaintenance()
+	{
+		$input = ['c' => 3, 'a' => 1, 'd' => 4, 'b' => 1, 'e' => 5];
+		$expected = ['a' => 1, 'b' => 1, 'c' => 3, 'd' => 4, 'e' => 5];
+
+		$result = ArrayHandler::sortArray($input, false, false, true);
+
+		$this->assertEquals($expected, $result);
+	}
+
+	/**
+	 * Test descending sort with key maintenance
+	 */
+	public function testDescendingSortWithKeyMaintenance()
+	{
+		$input = ['c' => 3, 'a' => 1, 'd' => 4, 'b' => 1, 'e' => 5];
+		$expected = ['e' => 5, 'd' => 4, 'c' => 3, 'a' => 1, 'b' => 1];
+
+		$result = ArrayHandler::sortArray($input, false, true, true);
+
+		$this->assertEquals($expected, $result);
+	}
+
+	/**
+	 * Test string sorting with lowercase conversion
+	 */
+	public function testStringLowerCaseSort()
+	{
+		$input = ['Banana', 'apple', 'Cherry', 'date'];
+		$expected = ['apple', 'Banana', 'Cherry', 'date'];
+
+		$result = ArrayHandler::sortArray($input, true);
+
+		$this->assertEquals($expected, $result);
+	}
+
+	/**
+	 * Test string sorting with lowercase conversion in reverse
+	 */
+	public function testStringLowerCaseSortReverse()
+	{
+		$input = ['Banana', 'apple', 'Cherry', 'date'];
+		$expected = ['date', 'Cherry', 'Banana', 'apple'];
+
+		$result = ArrayHandler::sortArray($input, true, true);
+
+		$this->assertEquals($expected, $result);
+	}
+
+	/**
+	 * Test string sorting with lowercase conversion and key maintenance
+	 */
+	public function testStringLowerCaseSortWithKeys()
+	{
+		$input = ['b' => 'Banana', 'a' => 'apple', 'c' => 'Cherry', 'd' => 'date'];
+		$expected = ['a' => 'apple', 'b' => 'Banana', 'c' => 'Cherry', 'd' => 'date'];
+
+		$result = ArrayHandler::sortArray($input, true, false, true);
+
+		$this->assertEquals($expected, $result);
+	}
+
+	/**
+	 * Test string sorting with lowercase conversion, reverse, and key maintenance
+	 */
+	public function testStringLowerCaseSortReverseWithKeys()
+	{
+		$input = ['b' => 'Banana', 'a' => 'apple', 'c' => 'Cherry', 'd' => 'date'];
+		$expected = ['d' => 'date', 'c' => 'Cherry', 'b' => 'Banana', 'a' => 'apple'];
+
+		$result = ArrayHandler::sortArray($input, true, true, true);
+
+		$this->assertEquals($expected, $result);
+	}
+
+	/**
+	 * Test numeric string sorting with SORT_NUMERIC flag
+	 */
+	public function testNumericStringSorting()
+	{
+		$input = ['10', '2', '1', '20'];
+		$expected = ['1', '2', '10', '20'];
+
+		$result = ArrayHandler::sortArray($input, false, false, false, SORT_NUMERIC);
+
+		$this->assertEquals($expected, $result);
+	}
+
+	/**
+	 * Test natural string sorting with SORT_NATURAL flag
+	 */
+	public function testNaturalStringSorting()
+	{
+		$input = ['img1.png', 'img10.png', 'img2.png', 'img20.png'];
+		$expected = ['img1.png', 'img2.png', 'img10.png', 'img20.png'];
+
+		$result = ArrayHandler::sortArray($input, false, false, false, SORT_NATURAL);
+
+		$this->assertEquals($expected, $result);
+	}
+
+	/**
+	 * Test with empty array
+	 */
+	public function testEmptyArray()
+	{
+		$input = [];
+		$expected = [];
+
+		$result = ArrayHandler::sortArray($input);
+
+		$this->assertEquals($expected, $result);
+	}
+
+	/**
+	 * Test with single element array
+	 */
+	public function testSingleElementArray()
+	{
+		$input = [42];
+		$expected = [42];
+
+		$result = ArrayHandler::sortArray($input);
+
+		$this->assertEquals($expected, $result);
+	}
+
+	/**
+	 * Test with array containing null values
+	 */
+	public function testArrayWithNullValues()
+	{
+		$input = [3, null, 1, null, 2];
+		$expected = [null, null, 1, 2, 3];
+
+		$result = ArrayHandler::sortArray($input);
+
+		$this->assertEquals($expected, $result);
+	}
+
+	/**
+	 * Test with mixed data types
+	 */
+	public function testMixedDataTypes()
+	{
+		$input = [3, '1', 4.5, '2', 1];
+
+		$result = ArrayHandler::sortArray($input);
+
+		// Should sort according to PHP's natural comparison rules
+		$this->assertIsArray($result);
+		$this->assertCount(5, $result);
+	}
+
+	/**
+	 * Test that original array is not modified (immutability)
+	 */
+	public function testOriginalArrayNotModified()
+	{
+		$original = [3, 1, 4, 1, 5, 9];
+		$input = $original;
+
+		$result = ArrayHandler::sortArray($input);
+
+		$this->assertEquals($original, $input);
+		$this->assertNotEquals($input, $result);
+	}
+
+	/**
+	 * Test case sensitivity without lowercase flag
+	 */
+	public function testCaseSensitivityWithoutLowercase()
+	{
+		$input = ['Banana', 'apple', 'Cherry'];
+
+		$result = ArrayHandler::sortArray($input);
+
+		// Capital letters should come before lowercase in ASCII sort
+		$this->assertEquals('Banana', $result[0]);
+		$this->assertEquals('Cherry', $result[1]);
+		$this->assertEquals('apple', $result[2]);
+	}
+
+	/**
+	 * Test all parameters combination
+	 */
+	public function testAllParametersCombination()
+	{
+		$input = ['z' => 'Zebra', 'a' => 'apple', 'b' => 'Banana'];
+
+		$result = ArrayHandler::sortArray($input, true, true, true, SORT_REGULAR);
+
+		// Should be sorted by lowercase, reversed, with keys maintained
+		$keys = array_keys($result);
+		$values = array_values($result);
+
+		$this->assertEquals(['z', 'b', 'a'], $keys);
+		$this->assertEquals(['Zebra', 'Banana', 'apple'], $values);
+	}
+
+	/**
+	 * Test floating point numbers
+	 */
+	public function testFloatingPointNumbers()
+	{
+		$input = [3.14, 2.71, 1.41, 1.73];
+		$expected = [1.41, 1.73, 2.71, 3.14];
+
+		$result = ArrayHandler::sortArray($input);
+
+		$this->assertEquals($expected, $result);
+	}
+
+	/**
+	 * Test with duplicate values and key maintenance
+	 */
+	public function testDuplicateValuesWithKeyMaintenance()
+	{
+		$input = ['first' => 1, 'second' => 2, 'third' => 1, 'fourth' => 2];
+
+		$result = ArrayHandler::sortArray($input, false, false, true);
+
+		$this->assertCount(4, $result);
+		$this->assertEquals([1, 1, 2, 2], array_values($result));
+		// Keys should be preserved
+		$this->assertArrayHasKey('first', $result);
+		$this->assertArrayHasKey('second', $result);
+		$this->assertArrayHasKey('third', $result);
+		$this->assertArrayHasKey('fourth', $result);
+	}
+
+	/**
+	 * Data provider for comprehensive parameter testing
+	 */
+	public function sortParameterProvider(): array
+	{
+		return [
+			'basic_ascending' => [
+				[3, 1, 4, 2],
+				false, false, false, SORT_REGULAR,
+				[1, 2, 3, 4]
+			],
+			'basic_descending' => [
+				[3, 1, 4, 2],
+				false, true, false, SORT_REGULAR,
+				[4, 3, 2, 1]
+			],
+			'lowercase_ascending' => [
+				['Banana', 'apple', 'Cherry'],
+				true, false, false, SORT_REGULAR,
+				['apple', 'Banana', 'Cherry']
+			],
+			'lowercase_descending' => [
+				['Banana', 'apple', 'Cherry'],
+				true, true, false, SORT_REGULAR,
+				['Cherry', 'Banana', 'apple']
+			]
+		];
+	}
+
+	/**
+	 * Test various parameter combinations using data provider
+	 *
+	 * @dataProvider sortParameterProvider
+	 */
+	public function testSortParameterCombinations(
+		array $input,
+		bool $lowercase,
+		bool $reverse,
+		bool $maintainKeys,
+		int $params,
+		array $expected
+	) {
+		$result = ArrayHandler::sortArray($input, $lowercase, $reverse, $maintainKeys, $params);
+
+		if (!$maintainKeys) {
+			$this->assertEquals($expected, $result);
+		} else {
+			$this->assertEquals($expected, array_values($result));
+		}
+	}
+}
+
+// __END__

test/phpunit/Convert/CoreLibsConvertStringsRegexValidateTest.php

@@ -0,0 +1,283 @@
+<?php
+
+// This code was created by Claude Sonnet 4
+// FIX:
+// '/test{/',          // Unmatched brace -> this is valid
+// '/test{1,}/',       // Invalid quantifier -> this is valid
+
+declare(strict_types=1);
+
+namespace tests;
+
+use PHPUnit\Framework\TestCase;
+use CoreLibs\Convert\Strings;
+
+/**
+ * Test class for CoreLibs\Convert\Strings regex validation methods
+ */
+class CoreLibsConvertStringsRegexValidateTest extends TestCase
+{
+	/**
+	 * Test isValidRegex with valid regex patterns
+	 */
+	public function testIsValidRegexWithValidPatterns(): void
+	{
+		$validPatterns = [
+			'/^[a-zA-Z0-9]+$/',
+			'/test/',
+			'/\d+/',
+			'/^hello.*world$/',
+			'/[0-9]{3}-[0-9]{3}-[0-9]{4}/',
+			'#^https?://.*#i',
+			'~^[a-z]+~',
+			'|test|',
+			'/^$/m',
+			'/\w+/u',
+		];
+
+		foreach ($validPatterns as $pattern) {
+			$this->assertTrue(
+				Strings::isValidRegex($pattern),
+				"Pattern '{$pattern}' should be valid"
+			);
+		}
+	}
+
+	/**
+	 * Test isValidRegex with invalid regex patterns
+	 */
+	public function testIsValidRegexWithInvalidPatterns(): void
+	{
+		$invalidPatterns = [
+			'/[/',              // Unmatched bracket
+			'/test[/',          // Unmatched bracket
+			'/(?P<name>/',      // Unmatched parenthesis
+			'/(?P<>test)/',     // Invalid named group
+			'/test\\/',         // Invalid escape at end
+			'/(test/',          // Unmatched parenthesis
+			'/test)/',          // Unmatched parenthesis
+			// '/test{/',          // Unmatched brace -> this is valid
+			// '/test{1,}/',       // Invalid quantifier -> this is valid
+			'/[z-a]/',          // Invalid character range
+			'invalid',          // No delimiters
+			'',                 // Empty string
+			'/(?P<123>test)/',  // Invalid named group name
+		];
+
+		foreach ($invalidPatterns as $pattern) {
+			$this->assertFalse(
+				Strings::isValidRegex($pattern),
+				"Pattern '{$pattern}' should be invalid"
+			);
+		}
+	}
+
+	/**
+	 * Test getLastRegexErrorString returns correct error messages
+	 */
+	public function testGetLastRegexErrorStringReturnsCorrectMessages(): void
+	{
+		// Test with a valid regex first to ensure clean state
+		Strings::isValidRegex('/valid/');
+		$this->assertEquals('No error', Strings::getLastRegexErrorString());
+
+		// Test with invalid regex to trigger an error
+		Strings::isValidRegex('/[/');
+		$errorMessage = Strings::getLastRegexErrorString();
+
+		// The error message should be one of the defined messages
+		$this->assertContains($errorMessage, array_values(Strings::PREG_ERROR_MESSAGES));
+		$this->assertNotEquals('Unknown error', $errorMessage);
+	}
+
+	/**
+	 * Test getLastRegexErrorString with unknown error
+	 */
+	public function testGetLastRegexErrorStringWithUnknownError(): void
+	{
+		// This is harder to test directly since we can't easily mock preg_last_error()
+		// but we can test the fallback behavior by reflection or assume it works
+
+		// At minimum, ensure it returns a string
+		$result = Strings::getLastRegexErrorString();
+		$this->assertIsString($result);
+		$this->assertNotEmpty($result);
+	}
+
+	/**
+	 * Test validateRegex with valid patterns
+	 */
+	public function testValidateRegexWithValidPatterns(): void
+	{
+		$validPatterns = [
+			'/^test$/',
+			'/\d+/',
+			'/[a-z]+/i',
+		];
+
+		foreach ($validPatterns as $pattern) {
+			$result = Strings::validateRegex($pattern);
+
+			$this->assertIsArray($result);
+			$this->assertArrayHasKey('valid', $result);
+			$this->assertArrayHasKey('preg_error', $result);
+			$this->assertArrayHasKey('error', $result);
+
+			$this->assertTrue($result['valid'], "Pattern '{$pattern}' should be valid");
+			$this->assertEquals(PREG_NO_ERROR, $result['preg_error']);
+			$this->assertNull($result['error']);
+		}
+	}
+
+	/**
+	 * Test validateRegex with invalid patterns
+	 */
+	public function testValidateRegexWithInvalidPatterns(): void
+	{
+		$invalidPatterns = [
+			'/[/',              // Unmatched bracket
+			'/(?P<name>/',      // Unmatched parenthesis
+			'/test\\/',         // Invalid escape at end
+			'/(test/',          // Unmatched parenthesis
+		];
+
+		foreach ($invalidPatterns as $pattern) {
+			$result = Strings::validateRegex($pattern);
+
+			$this->assertIsArray($result);
+			$this->assertArrayHasKey('valid', $result);
+			$this->assertArrayHasKey('preg_error', $result);
+			$this->assertArrayHasKey('error', $result);
+			$this->assertArrayHasKey('pcre_error', $result);
+
+			$this->assertFalse($result['valid'], "Pattern '{$pattern}' should be invalid");
+			$this->assertNotEquals(PREG_NO_ERROR, $result['preg_error']);
+			$this->assertIsString($result['error']);
+			$this->assertNotNull($result['error']);
+			$this->assertNotEmpty($result['error']);
+
+			// Verify error message is from our defined messages or 'Unknown error'
+			$this->assertTrue(
+				in_array($result['error'], array_values(Strings::PREG_ERROR_MESSAGES)) ||
+				$result['error'] === 'Unknown error'
+			);
+		}
+	}
+
+	/**
+	 * Test validateRegex array structure
+	 */
+	public function testValidateRegexArrayStructure(): void
+	{
+		$result = Strings::validateRegex('/test/');
+
+		// Test array structure for valid regex
+		$this->assertIsArray($result);
+		$this->assertCount(4, $result);
+		$this->assertArrayHasKey('valid', $result);
+		$this->assertArrayHasKey('preg_error', $result);
+		$this->assertArrayHasKey('error', $result);
+
+		$result = Strings::validateRegex('/[/');
+
+		// Test array structure for invalid regex
+		$this->assertIsArray($result);
+		$this->assertCount(4, $result);
+		$this->assertArrayHasKey('valid', $result);
+		$this->assertArrayHasKey('preg_error', $result);
+		$this->assertArrayHasKey('error', $result);
+		$this->assertArrayHasKey('pcre_error', $result);
+	}
+
+	/**
+	 * Test that methods handle edge cases properly
+	 */
+	public function testEdgeCases(): void
+	{
+		// Empty string
+		$this->assertFalse(Strings::isValidRegex(''));
+
+		$result = Strings::validateRegex('');
+		$this->assertFalse($result['valid']);
+
+		// Very long pattern
+		$longPattern = '/' . str_repeat('a', 1000) . '/';
+		$this->assertTrue(Strings::isValidRegex($longPattern));
+
+		// Unicode patterns
+		$this->assertTrue(Strings::isValidRegex('/\p{L}+/u'));
+		$this->assertTrue(Strings::isValidRegex('/[α-ω]+/u'));
+	}
+
+	/**
+	 * Test PREG_ERROR_MESSAGES constant accessibility
+	 */
+	public function testPregErrorMessagesConstant(): void
+	{
+		$this->assertIsArray(Strings::PREG_ERROR_MESSAGES);
+		$this->assertNotEmpty(Strings::PREG_ERROR_MESSAGES);
+
+		// Check that all expected PREG constants are defined
+		$expectedKeys = [
+			PREG_NO_ERROR,
+			PREG_INTERNAL_ERROR,
+			PREG_BACKTRACK_LIMIT_ERROR,
+			PREG_RECURSION_LIMIT_ERROR,
+			PREG_BAD_UTF8_ERROR,
+			PREG_BAD_UTF8_OFFSET_ERROR,
+			PREG_JIT_STACKLIMIT_ERROR,
+		];
+
+		foreach ($expectedKeys as $key) {
+			$this->assertArrayHasKey($key, Strings::PREG_ERROR_MESSAGES);
+			$this->assertIsString(Strings::PREG_ERROR_MESSAGES[$key]);
+			$this->assertNotEmpty(Strings::PREG_ERROR_MESSAGES[$key]);
+		}
+	}
+
+	/**
+	 * Test error state isolation between method calls
+	 */
+	public function testErrorStateIsolation(): void
+	{
+		// Start with invalid regex
+		Strings::isValidRegex('/[/');
+		$firstError = Strings::getLastRegexErrorString();
+		$this->assertNotEquals('No error', $firstError);
+
+		// Use valid regex
+		Strings::isValidRegex('/valid/');
+		$secondError = Strings::getLastRegexErrorString();
+		$this->assertEquals('No error', $secondError);
+
+		// Verify validateRegex clears previous errors
+		$result = Strings::validateRegex('/valid/');
+		$this->assertTrue($result['valid']);
+		$this->assertEquals(PREG_NO_ERROR, $result['preg_error']);
+	}
+
+	/**
+	 * Test various regex delimiters
+	 */
+	public function testDifferentDelimiters(): void
+	{
+		$patterns = [
+			'/test/',      // forward slash
+			'#test#',      // hash
+			'~test~',      // tilde
+			'|test|',      // pipe
+			'@test@',      // at symbol
+			'!test!',      // exclamation
+			'%test%',      // percent
+		];
+
+		foreach ($patterns as $pattern) {
+			$this->assertTrue(
+				Strings::isValidRegex($pattern),
+				"Pattern with delimiter '{$pattern}' should be valid"
+			);
+		}
+	}
+}
+
+// __END__

test/phpunit/Convert/CoreLibsConvertStringsTest.php

@@ -24,117 +24,83 @@ final class CoreLibsConvertStringsTest extends TestCase
 	{
 		// 0: input
 		// 1: format
-		// 2: split characters as string, null for default
 		// 3: expected
 		return [
 			'all empty string' => [
 				'',
 				'',
-				null,
 				''
 			],
 			'empty input string' => [
 				'',
 				'2-2',
-				null,
 				''
 			],
 			'empty format string string' => [
 				'1234',
 				'',
-				null,
 				'1234'
 			],
 			'string format match' => [
 				'1234',
 				'2-2',
-				null,
 				'12-34'
 			],
 			'string format trailing match' => [
 				'1234',
 				'2-2-',
-				null,
 				'12-34'
 			],
 			'string format leading match' => [
 				'1234',
 				'-2-2',
-				null,
 				'12-34'
 			],
 			'string format double inside match' => [
 				'1234',
 				'2--2',
-				null,
 				'12--34',
 			],
 			'string format short first' => [
 				'1',
 				'2-2',
-				null,
 				'1'
 			],
 			'string format match first' => [
 				'12',
 				'2-2',
-				null,
 				'12'
 			],
 			'string format short second' => [
 				'123',
 				'2-2',
-				null,
 				'12-3'
 			],
 			'string format too long' => [
 				'1234567',
 				'2-2',
-				null,
 				'12-34-567'
 			],
-			'string format invalid format string' => [
-				'1234',
-				'2_2',
-				null,
-				'1234'
-			],
 			'different split character' => [
 				'1234',
 				'2_2',
-				'_',
 				'12_34'
 			],
 			'mixed split characters' => [
 				'123456',
 				'2-2_2',
-				'-_',
 				'12-34_56'
 			],
 			'length mixed' => [
 				'ABCD12345568ABC13',
 				'2-4_5-2#4',
-				'-_#',
 				'AB-CD12_34556-8A#BC13'
 			],
 			'split with split chars in string' => [
 				'12-34',
 				'2-2',
-				null,
 				'12--3-4'
 			],
-			'mutltibyte string' => [
-				'あいうえ',
-				'2-2',
-				null,
-				'あいうえ'
-			],
-			'mutltibyte split string' => [
-				'1234',
-				'２-２',
-				null,
-				'1234'
-			],
 		];
 	}
 
@@ -143,29 +109,137 @@ final class CoreLibsConvertStringsTest extends TestCase
 	 *
 	 * @covers ::splitFormatString
 	 * @dataProvider splitFormatStringProvider
-	 * @testdox splitFormatString $input with format $format and splitters $split_characters will be $expected [$_dataName]
+	 * @testdox splitFormatString $input with format $format will be $expected [$_dataName]
 	 *
 	 * @param  string      $input
 	 * @param  string      $format
-	 * @param  string|null $split_characters
 	 * @param  string      $expected
 	 * @return void
 	 */
 	public function testSplitFormatString(
 		string $input,
 		string $format,
+		string $expected
+	): void {
+		$output = \CoreLibs\Convert\Strings::splitFormatString(
+			$input,
+			$format,
+		);
+		$this->assertEquals(
+			$expected,
+			$output
+		);
+	}
+
+	/** check exceptions */
+	public function splitFormatStringExceptionProvider(): array
+	{
+		return [
+			'string format with no splitter match' => [
+				'1234',
+				'22',
+				'12-34'
+			],
+			'invalid format string' => [
+				'1234',
+				'2あ2',
+			],
+			'mutltibyte string' => [
+				'あいうえ',
+				'2-2',
+			],
+			'mutltibyte split string' => [
+				'1234',
+				'２-２',
+			],
+		];
+	}
+
+	/**
+	 * Undocumented function
+	 *
+	 * @covers ::splitFormatStringFixed
+	 * @dataProvider splitFormatStringExceptionProvider
+	 * @testdox splitFormatString Exception catch checks for $input with $format[$_dataName]
+	 *
+	 * @return void
+	 */
+	public function testSplitFormatStringExceptions(string $input, string $format): void
+	{
+		// catch exception
+		$this->expectException(\InvalidArgumentException::class);
+		\CoreLibs\Convert\Strings::splitFormatString($input, $format);
+	}
+
+	/**
+	 * test for split Format string fixed length
+	 *
+	 * @return array
+	 */
+	public function splitFormatStringFixedProvider(): array
+	{
+		return [
+			'normal split, default split char' => [
+				'abcdefg',
+				4,
+				null,
+				'abcd-efg'
+			],
+			'noraml split, other single split char' => [
+				'abcdefg',
+				4,
+				"=",
+				'abcd=efg'
+			],
+			'noraml split, other multiple split char' => [
+				'abcdefg',
+				4,
+				"-=-",
+				'abcd-=-efg'
+			],
+			'non ascii characters' => [
+				'あいうえお',
+				2,
+				"-",
+				'あい-うえ-お'
+			],
+			'empty string' => [
+				'',
+				4,
+				"-",
+				''
+			]
+		];
+	}
+
+	/**
+	 * Undocumented function
+	 *
+	 * @covers ::splitFormatStringFixed
+	 * @dataProvider splitFormatStringFixedProvider
+	 * @testdox splitFormatStringFixed $input with length $split_length and split chars $split_characters will be $expected [$_dataName]
+	 *
+	 * @param  string      $input
+	 * @param  int         $split_length
+	 * @param  string|null $split_characters
+	 * @param  string      $expected
+	 * @return void
+	 */
+	public function testSplitFormatStringFixed(
+		string $input,
+		int $split_length,
 		?string $split_characters,
 		string $expected
 	): void {
 		if ($split_characters === null) {
-			$output = \CoreLibs\Convert\Strings::splitFormatString(
+			$output = \CoreLibs\Convert\Strings::splitFormatStringFixed(
 				$input,
-				$format
+				$split_length
 			);
 		} else {
-			$output = \CoreLibs\Convert\Strings::splitFormatString(
+			$output = \CoreLibs\Convert\Strings::splitFormatStringFixed(
 				$input,
-				$format,
+				$split_length,
 				$split_characters
 			);
 		}
@@ -175,6 +249,36 @@ final class CoreLibsConvertStringsTest extends TestCase
 		);
 	}
 
+	public function splitFormatStringFixedExceptionProvider(): array
+	{
+		return [
+			'split length too short' => [
+				'abcdefg',
+				-1,
+			],
+			'split length longer than string' => [
+				'abcdefg',
+				20,
+			],
+		];
+	}
+
+	/**
+	 * Undocumented function
+	 *
+	 * @covers ::splitFormatStringFixed
+	 * @dataProvider splitFormatStringFixedExceptionProvider
+	 * @testdox splitFormatStringFixed Exception catch checks for $input with $length [$_dataName]
+	 *
+	 * @return void
+	 */
+	public function testSplitFormatStringFixedExceptions(string $input, int $length): void
+	{
+		// catch exception
+		$this->expectException(\InvalidArgumentException::class);
+		\CoreLibs\Convert\Strings::splitFormatStringFixed($input, $length);
+	}
+
 	/**
 	 * Undocumented function
 	 *
@@ -378,6 +482,222 @@ final class CoreLibsConvertStringsTest extends TestCase
 			\CoreLibs\Convert\Strings::stripUTF8BomBytes($file)
 		);
 	}
+
+	/**
+	 * Undocumented function
+	 *
+	 * @return array
+	 */
+	public function allCharsInSetProvider(): array
+	{
+		return [
+			'find' => [
+				'abc',
+				'abcdef',
+				true
+			],
+			'not found' => [
+				'abcz',
+				'abcdef',
+				false
+			]
+		];
+	}
+
+	/**
+	 * Undocumented function
+	 *
+	 * @covers ::allCharsInSet
+	 * @dataProvider allCharsInSetProvider
+	 * @testdox allCharsInSet $input in $haystack with expected $expected [$_dataName]
+	 *
+	 * @param  string $needle
+	 * @param  string $haystack
+	 * @param  bool   $expected
+	 * @return void
+	 */
+	public function testAllCharsInSet(string $needle, string $haystack, bool $expected): void
+	{
+		$this->assertEquals(
+			$expected,
+			\CoreLibs\Convert\Strings::allCharsInSet($needle, $haystack)
+		);
+	}
+
+	public function buildCharStringFromListsProvider(): array
+	{
+		return [
+			'test a' => [
+				'abc',
+				['a', 'b', 'c'],
+			],
+			'test b' => [
+				'abc123',
+				['a', 'b', 'c'],
+				['1', '2', '3'],
+			],
+			'test c: no params' => [
+				'',
+			],
+			'test c: empty 1' => [
+				'',
+				[]
+			],
+			'test nested' => [
+				'abc',
+				[['a'], ['b'], ['c']],
+			],
+		];
+	}
+
+	/**
+	 * Undocumented function
+	 *
+	 * @covers ::buildCharStringFromLists
+	 * @dataProvider buildCharStringFromListsProvider
+	 * @testdox buildCharStringFromLists all $input convert to $expected [$_dataName]
+	 *
+	 * @param  string $expected
+	 * @param  array  ...$input
+	 * @return void
+	 */
+	public function testBuildCharStringFromLists(string $expected, array ...$input): void
+	{
+		$this->assertEquals(
+			$expected,
+			\CoreLibs\Convert\Strings::buildCharStringFromLists(...$input)
+		);
+	}
+
+	/**
+	 * Undocumented function
+	 *
+	 * @return array
+	 */
+	public function removeDuplicatesProvider(): array
+	{
+		return [
+			'test no change' => [
+				'ABCDEFG',
+				'ABCDEFG',
+			],
+			'test simple' => [
+				'aa',
+				'a'
+			],
+			'test keep lower and uppwer case' => [
+				'AaBbCc',
+				'AaBbCc'
+			],
+			'test unqiue' => [
+				'aabbcc',
+				'abc'
+			],
+			'test multibyte no change' => [
+				'あいうえお',
+				'あいうえお',
+			],
+			'test multibyte' => [
+				'ああいいううええおお',
+				'あいうえお',
+			],
+			'test multibyte special' => [
+				'あぁいぃうぅえぇおぉ',
+				'あぁいぃうぅえぇおぉ',
+			]
+		];
+	}
+
+	/**
+	 * Undocumented function
+	 *
+	 * @covers ::removeDuplicates
+	 * @dataProvider removeDuplicatesProvider
+	 * @testdox removeDuplicates make $input unqiue to $expected [$_dataName]
+	 *
+	 * @param  string $input
+	 * @param  string $expected
+	 * @return void
+	 */
+	public function testRemoveDuplicates(string $input, string $expected): void
+	{
+		$this->assertEquals(
+			$expected,
+			\CoreLibs\Convert\Strings::removeDuplicates($input)
+		);
+	}
+
+	/**
+	 * Undocumented function
+	 *
+	 * @return array
+	 */
+	public function isValidRegexSimpleProvider(): array
+	{
+		return [
+			'valid regex' => [
+				'/^[A-z]$/',
+				true,
+				[
+					'valid' => true,
+					'preg_error' => 0,
+					'error' => null,
+					'pcre_error' => null
+				],
+			],
+			'invalid regex A' => [
+				'/^[A-z]$',
+				false,
+				[
+					'valid' => false,
+					'preg_error' => 1,
+					'error' => 'Internal PCRE error',
+					'pcre_error' => 'Internal error'
+				],
+			],
+			'invalid regex B' => [
+				'/^[A-z$',
+				false,
+				[
+					'valid' => false,
+					'preg_error' => 1,
+					'error' => 'Internal PCRE error',
+					'pcre_error' => 'Internal error'
+				],
+			],
+		];
+	}
+
+	/**
+	 * Undocumented function
+	 *
+	 * @covers ::isValidRegexSimple
+	 * @dataProvider isValidRegexSimpleProvider
+	 * @testdox isValidRegexSimple make $input unqiue to $expected [$_dataName]
+	 *
+	 * @param  string $input
+	 * @param  bool $expected
+	 * @return void
+	 */
+	public function testIsValidRegexSimple(string $input, bool $expected, array $expected_extended): void
+	{
+		$this->assertEquals(
+			$expected,
+			\CoreLibs\Convert\Strings::isValidRegex($input),
+			'Regex is not valid'
+		);
+		$this->assertEquals(
+			$expected_extended,
+			\CoreLibs\Convert\Strings::validateRegex($input),
+			'Validation of regex failed'
+		);
+		$this->assertEquals(
+			// for true null is set, so we get here No Error
+			$expected_extended['error'] ?? \CoreLibs\Convert\Strings::PREG_ERROR_MESSAGES[0],
+			\CoreLibs\Convert\Strings::getLastRegexErrorString(),
+			'Cannot match last preg error string'
+		);
+	}
 }
 
 // __END__

test/phpunit/Create/CoreLibsCreateRandomKeyTest.php

@@ -13,32 +13,6 @@ use PHPUnit\Framework\TestCase;
  */
 final class CoreLibsCreateRandomKeyTest extends TestCase
 {
-	/**
-	 * Undocumented function
-	 *
-	 * @return array
-	 */
-	public function keyLenghtProvider(): array
-	{
-		return [
-			'valid key length' => [
-				0 => 6,
-				1 => true,
-				2 => 6,
-			],
-			'negative key length' => [
-				0 => -1,
-				1 => false,
-				2 => 4,
-			],
-			'tpp big key length' => [
-				0 => 300,
-				1 => false,
-				2 => 4,
-			],
-		];
-	}
-
 	/**
 	 * Undocumented function
 	 *
@@ -47,109 +21,67 @@ final class CoreLibsCreateRandomKeyTest extends TestCase
 	public function randomKeyGenProvider(): array
 	{
 		return [
-			'default key length' => [
+			// just key length
+			'default key length, default char set' => [
 				0 => null,
-				1 => 4
+				1 => \CoreLibs\Create\RandomKey::KEY_LENGTH_DEFAULT
 			],
-			'set -1 key length default' => [
+			'set -1 key length, default char set' => [
 				0 => -1,
-				1 => 4,
+				1 => \CoreLibs\Create\RandomKey::KEY_LENGTH_DEFAULT,
 			],
-			'set too large key length' => [
+			'set 0 key length, default char set' => [
+				0 => -1,
+				1 => \CoreLibs\Create\RandomKey::KEY_LENGTH_DEFAULT,
+			],
+			'set too large key length, default char set' => [
 				0 => 300,
-				1 => 4,
+				1 => \CoreLibs\Create\RandomKey::KEY_LENGTH_DEFAULT,
 			],
-			'set override key lenght' => [
+			'set override key lenght, default char set' => [
 				0 => 6,
 				1 => 6,
 			],
+			// just character set
+			'default key length, different char set A' => [
+				0 => \CoreLibs\Create\RandomKey::KEY_LENGTH_DEFAULT,
+				1 => \CoreLibs\Create\RandomKey::KEY_LENGTH_DEFAULT,
+				2 => [
+					'A', 'B', 'C'
+				],
+			],
+			'different key length, different char set B' => [
+				0 => 16,
+				1 => 16,
+				2 => [
+					'A', 'B', 'C'
+				],
+				3 => [
+					'1', '2', '3'
+				]
+			],
 		];
 	}
 
+	// Alternative more efficient version using strpos
 	/**
-	 * 1
+	 * check if all characters are in set
 	 *
-	 * @return array
+	 * @param  string $input
+	 * @param  string $allowed_chars
+	 * @return bool
 	 */
-	public function keepKeyLengthProvider(): array
+	private function allCharsInSet(string $input, string $allowed_chars): bool
 	{
-		return [
+		$inputLength = strlen($input);
-			'set too large' => [
-				0 => 6,
-				1 => 300,
-				2 => 6,
-			],
-			'set too small' => [
-				0 => 8,
-				1 => -2,
-				2 => 8,
-			],
-			'change valid' => [
-				0 => 10,
-				1 => 6,
-				2 => 6,
-			]
-		];
-	}
 
-	/**
+		for ($i = 0; $i < $inputLength; $i++) {
-	 * run before each test and reset to default 4
+			if (strpos($allowed_chars, $input[$i]) === false) {
-	 *
+				return false;
-	 * @before
+			}
-	 *
-	 * @return void
-	 */
-	public function resetKeyLength(): void
-	{
-		\CoreLibs\Create\RandomKey::setRandomKeyLength(4);
-	}
-
-	/**
-	 * check that first length is 4
-	 *
-	 * @covers ::getRandomKeyLength
-	 * @testWith [4]
-	 * @testdox getRandomKeyLength on init will be $expected [$_dataName]
-	 *
-	 * @param integer $expected
-	 * @return void
-	 */
-	public function testGetRandomKeyLengthInit(int $expected): void
-	{
-		$this->assertEquals(
-			$expected,
-			\CoreLibs\Create\RandomKey::getRandomKeyLength()
-		);
-	}
-
-	/**
-	 * Undocumented function
-	 *
-	 * @covers ::setRandomKeyLength
-	 * @covers ::getRandomKeyLength
-	 * @dataProvider keyLenghtProvider
-	 * @testdox setRandomKeyLength $input will be $expected, compare to $compare [$_dataName]
-	 *
-	 * @param integer $input
-	 * @param boolean $expected
-	 * @param integer $compare
-	 * @return void
-	 */
-	public function testSetRandomKeyLength(int $input, bool $expected, int $compare): void
-	{
-		// set
-		$this->assertEquals(
-			$expected,
-			\CoreLibs\Create\RandomKey::setRandomKeyLength($input)
-		);
-		// read test, if false, use compare check
-		if ($expected === false) {
-			$input = $compare;
 		}
-		$this->assertEquals(
+
-			$input,
+		return true;
-			\CoreLibs\Create\RandomKey::getRandomKeyLength()
-		);
 	}
 
 	/**
@@ -163,43 +95,41 @@ final class CoreLibsCreateRandomKeyTest extends TestCase
 	 * @param integer $expected
 	 * @return void
 	 */
-	public function testRandomKeyGen(?int $input, int $expected): void
+	public function testRandomKeyGen(?int $input, int $expected, array ...$key_range): void
 	{
+		$__key_data = \CoreLibs\Create\RandomKey::KEY_CHARACTER_RANGE_DEFAULT;
+		if (count($key_range)) {
+			$__key_data = join('', array_unique(array_merge(...$key_range)));
+		}
 		if ($input === null) {
 			$this->assertEquals(
 				$expected,
 				strlen(\CoreLibs\Create\RandomKey::randomKeyGen())
 			);
-		} else {
+		} elseif ($input !== null && !count($key_range)) {
+			$random_key = \CoreLibs\Create\RandomKey::randomKeyGen($input);
+			$this->assertTrue(
+				$this->allCharsInSet($random_key, $__key_data),
+				'Characters not valid'
+			);
 			$this->assertEquals(
 				$expected,
-				strlen(\CoreLibs\Create\RandomKey::randomKeyGen($input))
+				strlen($random_key),
+				'String length not matching'
+			);
+		} elseif (count($key_range)) {
+			$random_key = \CoreLibs\Create\RandomKey::randomKeyGen($input, ...$key_range);
+			$this->assertTrue(
+				$this->allCharsInSet($random_key, $__key_data),
+				'Characters not valid'
+			);
+			$this->assertEquals(
+				$expected,
+				strlen($random_key),
+				'String length not matching'
 			);
 		}
 	}
-
-	/**
-	 * Check that if set to n and then invalid, it keeps the previous one
-	 * or if second change valid, second will be shown
-	 *
-	 * @covers ::setRandomKeyLength
-	 * @dataProvider keepKeyLengthProvider
-	 * @testdox keep setRandomKeyLength set with $input_valid and then $input_invalid will be $expected [$_dataName]
-	 *
-	 * @param integer $input_valid
-	 * @param integer $input_invalid
-	 * @param integer $expected
-	 * @return void
-	 */
-	public function testKeepKeyLength(int $input_valid, int $input_invalid, int $expected): void
-	{
-		\CoreLibs\Create\RandomKey::setRandomKeyLength($input_valid);
-		\CoreLibs\Create\RandomKey::setRandomKeyLength($input_invalid);
-		$this->assertEquals(
-			$expected,
-			\CoreLibs\Create\RandomKey::getRandomKeyLength()
-		);
-	}
 }
 
 // __END__

test/phpunit/Logging/CoreLibsLoggingLoggingTest.php

@@ -249,7 +249,7 @@ final class CoreLibsLoggingLoggingTest extends TestCase
 		$this->assertFalse(
 			$log->loggingLevelIsDebug()
 		);
-		// not set, should be debug]
+		// not set, should be debug
 		$log = new \CoreLibs\Logging\Logging([
 			'log_file_id' => 'testSetLoggingLevel',
 			'log_folder' => self::LOG_FOLDER,
@@ -297,6 +297,71 @@ final class CoreLibsLoggingLoggingTest extends TestCase
 		$log->setLoggingLevel('NotGood');
 	}
 
+	/**
+	 * Undocumented function
+	 *
+	 * @covers ::setErrorLogWriteLevel
+	 * @covers ::getErrorLogWriteLevel
+	 * @testdox setErrorLogWriteLevel set/get checks
+	 *
+	 * @return void
+	 */
+	public function testSetErrorLogWriteLevel(): void
+	{
+		// valid that is not Debug
+		$log = new \CoreLibs\Logging\Logging([
+			'log_file_id' => 'testSetErrorLogWriteLevel',
+			'log_folder' => self::LOG_FOLDER,
+			'error_log_write_level' => Level::Error
+		]);
+		$this->assertEquals(
+			Level::Error,
+			$log->getErrorLogWriteLevel()
+		);
+		// not set on init
+		$log = new \CoreLibs\Logging\Logging([
+			'log_file_id' => 'testSetErrorLogWriteLevel',
+			'log_folder' => self::LOG_FOLDER,
+		]);
+		$this->assertEquals(
+			Level::Emergency,
+			$log->getErrorLogWriteLevel()
+		);
+		// invalid, should be Emergency, will throw excpetion too
+		$this->expectException(\InvalidArgumentException::class);
+		$this->expectExceptionMessage(
+			'Option: "error_log_write_level" is not of instance \CoreLibs\Logging\Logger\Level'
+		);
+		$log = new \CoreLibs\Logging\Logging([
+			'log_file_id' => 'testSetLoggingLevel',
+			'log_folder' => self::LOG_FOLDER,
+			'error_log_write_level' => 'I'
+		]);
+		$this->assertEquals(
+			Level::Emergency,
+			$log->getErrorLogWriteLevel()
+		);
+		// set valid then change
+		$log = new \CoreLibs\Logging\Logging([
+			'log_file_id' => 'testSetErrorLogWriteLevel',
+			'log_folder' => self::LOG_FOLDER,
+			'error_log_write_level' => Level::Error
+		]);
+		$this->assertEquals(
+			Level::Error,
+			$log->getErrorLogWriteLevel()
+		);
+		$log->setErrorLogWriteLevel(Level::Notice);
+		$this->assertEquals(
+			Level::Notice,
+			$log->getErrorLogWriteLevel()
+		);
+		// illegal logging level
+		$this->expectException(\Psr\Log\InvalidArgumentException::class);
+		$this->expectExceptionMessageMatches("/^Level \"NotGood\" is not defined, use one of: /");
+		$log->setErrorLogWriteLevel('NotGood');
+	}
+
 	// setLogFileId
 	// getLogFileId