diff --git a/src/Admin/Backend.php b/src/Admin/Backend.php
index f06b786..44b771d 100644
--- a/src/Admin/Backend.php
+++ b/src/Admin/Backend.php
@@ -504,9 +504,9 @@ class Backend
 		string $data,
 		string $key_name,
 		string $key_value,
-		string $associate = null,
-		string $file = null,
-		string $db_schema = null,
+		?string $associate = null,
+		?string $file = null,
+		?string $db_schema = null,
 	): void {
 		/** @var string $DB_SCHEMA check schema */
 		$DB_SCHEMA = 'public';
diff --git a/src/Basic.php b/src/Basic.php
index d069486..065ec63 100644
--- a/src/Basic.php
+++ b/src/Basic.php
@@ -90,7 +90,7 @@ class Basic
 	 * @deprecated DO NOT USE Class\Basic anymore. Use dedicated logger and sub classes
 	 */
 	public function __construct(
-		\CoreLibs\Logging\Logging $log = null,
+		?\CoreLibs\Logging\Logging $log = null,
 		?string $session_name = null
 	) {
 		trigger_error('Class \CoreLibs\Basic is deprected', E_USER_DEPRECATED);
diff --git a/src/Convert/Extends/SetVarTypeMain.php b/src/Convert/Extends/SetVarTypeMain.php
index d32e416..7d4601c 100644
--- a/src/Convert/Extends/SetVarTypeMain.php
+++ b/src/Convert/Extends/SetVarTypeMain.php
@@ -52,7 +52,7 @@ class SetVarTypeMain
 	 */
 	protected static function makeStrMain(
 		mixed $val,
-		string $default = null,
+		?string $default = null,
 		bool $to_null = false
 	): ?string {
 		// int/float/string/bool/null, everything else is ignored
@@ -113,7 +113,7 @@ class SetVarTypeMain
 	 */
 	protected static function makeIntMain(
 		mixed $val,
-		int $default = null,
+		?int $default = null,
 		bool $to_null = false
 	): ?int {
 		// if we can filter it to a valid int, we can convert it
@@ -167,7 +167,7 @@ class SetVarTypeMain
 	 */
 	protected static function makeFloatMain(
 		mixed $val,
-		float $default = null,
+		?float $default = null,
 		bool $to_null = false
 	): ?float {
 		if (
diff --git a/src/Convert/SetVarTypeNull.php b/src/Convert/SetVarTypeNull.php
index 6d2c161..12d22e4 100644
--- a/src/Convert/SetVarTypeNull.php
+++ b/src/Convert/SetVarTypeNull.php
@@ -35,7 +35,7 @@ class SetVarTypeNull extends Extends\SetVarTypeMain
 	 * @param  string|null $default Default override value
 	 * @return string|null          Input value as string or default as string/null
 	 */
-	public static function makeStr(mixed $val, string $default = null): ?string
+	public static function makeStr(mixed $val, ?string $default = null): ?string
 	{
 		return SetVarTypeMain::makeStrMain($val, $default, true);
 	}
@@ -60,7 +60,7 @@ class SetVarTypeNull extends Extends\SetVarTypeMain
 	 * @param  int|null $default Default override value
 	 * @return int|null          Input value as int or default as int/null
 	 */
-	public static function makeInt(mixed $val, int $default = null): ?int
+	public static function makeInt(mixed $val, ?int $default = null): ?int
 	{
 		return SetVarTypeMain::makeIntMain($val, $default, true);
 	}
@@ -84,7 +84,7 @@ class SetVarTypeNull extends Extends\SetVarTypeMain
 	 * @param  float|null $default Default override value
 	 * @return float|null          Input value as float or default as float/null
 	 */
-	public static function makeFloat(mixed $val, float $default = null): ?float
+	public static function makeFloat(mixed $val, ?float $default = null): ?float
 	{
 		return SetVarTypeMain::makeFloatMain($val, $default, true);
 	}
diff --git a/src/DB/IO.php b/src/DB/IO.php
index c28471e..a006b1a 100644
--- a/src/DB/IO.php
+++ b/src/DB/IO.php
@@ -1896,7 +1896,12 @@ class IO
 		$matches = [];
 		// compare has =, >, < prefix, and gets stripped
 		// if the rest is not X.Y format then error
-		preg_match("/^([<>=]{1,})(\d{1,})\.(\d{1,})/", $compare, $matches);
+		if (!preg_match("/^([<>=]{1,})(\d{1,})\.(\d{1,})/", $compare, $matches)) {
+			$this->log->error('Could not regex match compare version string', [
+				"compare" => $compare
+			]);
+			return false;
+		}
 		$compare = $matches[1];
 		$to_master = $matches[2];
 		$to_minor = $matches[3];
@@ -1908,11 +1913,18 @@ class IO
 		}
 		// db_version can return X.Y.Z
 		// we only compare the first two
-		preg_match(
-			"/^(\d{1,})\.(\d{1,})\.?(\d{1,})?/",
-			$this->dbVersion(),
-			$matches
-		);
+		if (
+			!preg_match(
+				"/^(\d{1,})\.(\d{1,})\.?(\d{1,})?/",
+				$this->dbVersion(),
+				$matches
+			)
+		) {
+			$this->log->error('Could not regex match dbVersion string', [
+				"dbVersion" => $this->dbVersion()
+			]);
+			return false;
+		}
 		$master = $matches[1];
 		$minor = $matches[2];
 		$version = $master . ($minor < 10 ? '0' : '') . $minor;
diff --git a/src/Language/GetLocale.php b/src/Language/GetLocale.php
index 1f7842f..d0e6f9e 100644
--- a/src/Language/GetLocale.php
+++ b/src/Language/GetLocale.php
@@ -128,7 +128,7 @@ class GetLocale
 				$matches
 			)
 		) {
-			$lang = ($matches['lang'] ?? 'en')
+			$lang = $matches['lang']
 				// add country only if set
 				. (!empty($matches['country']) ? '_' . $matches['country'] : '');
 		} else {
@@ -235,7 +235,7 @@ class GetLocale
 				$matches
 			)
 		) {
-			$lang = ($matches['lang'] ?? 'en')
+			$lang = $matches['lang']
 				// add country only if set
 				. (!empty($matches['country']) ? '_' . $matches['country'] : '');
 		} else {
diff --git a/src/Logging/Logger/MessageLevel.php b/src/Logging/Logger/MessageLevel.php
index 8efc8bc..c03033e 100644
--- a/src/Logging/Logger/MessageLevel.php
+++ b/src/Logging/Logger/MessageLevel.php
@@ -14,6 +14,7 @@ namespace CoreLibs\Logging\Logger;
 enum MessageLevel: int
 {
 	case ok = 100;
+	case success = 110; // special for file uploads
 	case info = 200;
 	case notice = 250;
 	case warn = 300;
@@ -30,6 +31,7 @@ enum MessageLevel: int
 	{
 		return match (strtolower($name)) {
 			'ok' => self::ok,
+			'success' => self::success,
 			'info' => self::info,
 			'notice' => self::notice,
 			'warn', 'warning' => self::warn,
diff --git a/src/Output/Form/Elements.php b/src/Output/Form/Elements.php
index b6ee9d8..6fbd38e 100644
--- a/src/Output/Form/Elements.php
+++ b/src/Output/Form/Elements.php
@@ -194,13 +194,13 @@ class Elements
 			"/(mailto:)?(\>)?\b([\w\.-]+)@([\w\.\-]+)\.([a-zA-Z]{2,4})\b(\|([^\||^#]+)(#([^\|]+))?\|)?/",
 			function ($matches) {
 				return self::createEmail(
-					$matches[1] ?? '',
-					$matches[2] ?? '',
-					$matches[3] ?? '',
-					$matches[4] ?? '',
-					$matches[5] ?? '',
+					$matches[1],
+					$matches[2],
+					$matches[3],
+					$matches[4],
+					$matches[5],
 					$matches[7] ?? '',
-					$matches[9] ?? ''
+					$matches[9] ?? '',
 				);
 			},
 			$output
diff --git a/src/Template/HtmlBuilder/Element.php b/src/Template/HtmlBuilder/Element.php
index 85d5874..d9c2cc1 100644
--- a/src/Template/HtmlBuilder/Element.php
+++ b/src/Template/HtmlBuilder/Element.php
@@ -401,7 +401,7 @@ class Element
 	 * @param  bool         $add_nl [default=false] Optional output string line breaks
 	 * @return string                               HTML as string
 	 */
-	public function buildHtml(Element $tree = null, bool $add_nl = false): string
+	public function buildHtml(?Element $tree = null, bool $add_nl = false): string
 	{
 		// print "D01: " . microtime(true) . "<br>";
 		if ($tree === null) {
@@ -533,7 +533,7 @@ class Element
 	 * @return string                           build html as string
 	 * @deprecated Do not use, use Element->buildHtml() instead
 	 */
-	public static function printHtmlFromObject(Element $tree = null, bool $add_nl = false): string
+	public static function printHtmlFromObject(?Element $tree = null, bool $add_nl = false): string
 	{
 		// nothing ->bad
 		if ($tree === null) {
diff --git a/test/phpunit/Logging/CoreLibsLoggingErrorMessagesTest.php b/test/phpunit/Logging/CoreLibsLoggingErrorMessagesTest.php
index 7e1729c..a92b444 100644
--- a/test/phpunit/Logging/CoreLibsLoggingErrorMessagesTest.php
+++ b/test/phpunit/Logging/CoreLibsLoggingErrorMessagesTest.php
@@ -39,6 +39,11 @@ final class CoreLibsLoggingErrorMessagesTest extends TestCase
 				'str' => 'OK',
 				'expected' => 'ok',
 			],
+			'success' => [
+				'level' => 'success',
+				'str' => 'SUCCESS',
+				'expected' => 'success',
+			],
 			'info' => [
 				'level' => 'info',
 				'str' => 'INFO',