Init DB\IO dbh with null to avoid any problems

There could have been some problems where the dbh var was not touched
even thought it was inited.

4dev/tests/Combined/CoreLibsCombinedDateTimeTest.php

@@ -458,6 +458,47 @@ final class CoreLibsCombinedDateTimeTest extends TestCase
 		];
 	}
 
+	/**
+	 * Undocumented function
+	 *
+	 * @return array
+	 */
+	public function dateRangeHasWeekendProvider(): array
+	{
+		return [
+			'no weekend' => [
+				'2023-07-03',
+				'2023-07-04',
+				false
+			],
+			'start weekend sat' => [
+				'2023-07-01',
+				'2023-07-04',
+				true
+			],
+			'start weekend sun' => [
+				'2023-07-02',
+				'2023-07-04',
+				true
+			],
+			'end weekend sat' => [
+				'2023-07-03',
+				'2023-07-08',
+				true
+			],
+			'end weekend sun' => [
+				'2023-07-03',
+				'2023-07-09',
+				true
+			],
+			'long period > 6 days' => [
+				'2023-07-03',
+				'2023-07-27',
+				true
+			]
+		];
+	}
+
 	/**
 	 * date string convert test
 	 *
@@ -780,6 +821,29 @@ final class CoreLibsCombinedDateTimeTest extends TestCase
 			$output
 		);
 	}
+
+	/**
+	 * Undocumented function
+	 *
+	 * @covers ::dateRangeHasWeekend
+	 * @dataProvider dateRangeHasWeekendProvider
+	 * @testdox dateRangeHasWeekend $start_date and $end_date are expected weekend $expected [$_dataName]
+	 *
+	 * @param  string $start_date
+	 * @param  string $end_date
+	 * @param  bool   $expected
+	 * @return void
+	 */
+	public function testDateRangeHasWeekend(
+		string $start_date,
+		string $end_date,
+		bool $expected
+	): void {
+		$this->assertEquals(
+			$expected,
+			\CoreLibs\Combined\DateTime::dateRangeHasWeekend($start_date, $end_date)
+		);
+	}
 }
 
 // __END__

4dev/tests/Security/CoreLibsSecuritySymmetricEncryptionTest.php

@@ -13,7 +13,7 @@ use CoreLibs\Security\SymmetricEncryption;
  * @coversDefaultClass \CoreLibs\Security\SymmetricEncryption
  * @testdox \CoreLibs\Security\SymmetricEncryption method tests
  */
-final class CoreLibsSecuritySymmetricEncryption extends TestCase
+final class CoreLibsSecuritySymmetricEncryptionTest extends TestCase
 {
 	/**
 	 * Undocumented function

4dev/tests/Template/CoreLibsTemplateHtmlBuilderBlockTest.php

@@ -0,0 +1,34 @@
+<?php
+
+declare(strict_types=1);
+
+namespace tests;
+
+use PHPUnit\Framework\TestCase;
+use CoreLibs\Template\HtmlBuilder\Block;
+
+/**
+ * Test class for Template\HtmlBuilder\Block
+ * @coversDefaultClass \CoreLibs\Template\HtmlBuilder\Block
+ * @testdox \CoreLibs\Template\HtmlBuilder\Block method tests
+ */
+final class CoreLibsTemplateHtmlBuilderBlockTest extends TestCase
+{
+	public function testCreateBlock(): void
+	{
+		$el = Block::cel('div', 'id', 'content', ['css'], ['onclick' => 'foo();']);
+		$this->assertEquals(
+			'<div id="id" class="css" onclick="foo();">content</div>',
+			Block::buildHtml($el)
+		);
+	}
+
+	// ael
+	// aelx|addSub
+	// resetSub
+	// acssel/rcssel/scssel
+	// buildHtml
+	// buildHtmlFromList|printHtmlFromArray
+}
+
+// __END__

4dev/tests/Template/CoreLibsTemplateHtmlBuilderElementTest.php

@@ -0,0 +1,546 @@
+<?php
+
+declare(strict_types=1);
+
+namespace tests;
+
+use PHPUnit\Framework\TestCase;
+use CoreLibs\Template\HtmlBuilder\Element;
+use CoreLibs\Template\HtmlBuilder\General\Error;
+use CoreLibs\Template\HtmlBuilder\General\HtmlBuilderExcpetion;
+
+/**
+ * Test class for Template\HtmlBuilder\Element
+ * @coversDefaultClass \CoreLibs\Template\HtmlBuilder\Element
+ * @testdox \CoreLibs\Template\HtmlBuilder\Element method tests
+ */
+final class CoreLibsTemplateHtmlBuilderElementTest extends TestCase
+{
+	public function providerCreateElements(): array
+	{
+		return [
+			'simple div' => [
+				'tag' => 'div',
+				'id' => 'id',
+				'content' => 'content',
+				'css' => ['css'],
+				'options' => ['onclick' => 'foo();'],
+				'expected' => '<div id="id" class="css" onclick="foo();">content</div>'
+			],
+			'simple input' => [
+				'tag' => 'input',
+				'id' => 'id',
+				'content' => null,
+				'css' => ['css'],
+				'options' => ['name' => 'name', 'onclick' => 'foo();'],
+				'expected' => '<input id="id" name="name" class="css" onclick="foo();">'
+			]
+		];
+	}
+
+
+	/**
+	 * Undocumented function
+	 *
+	 * @covers ::Element
+	 * @covers ::buildHtml
+	 * @covers ::getTag
+	 * @covers ::getId
+	 * @covers ::getContent
+	 * @covers ::getOptions
+	 * @covers ::getCss
+	 * @dataProvider providerCreateElements
+	 * @testdox create single new Element test [$_dataName]
+	 *
+	 * @param  string      $tag
+	 * @param  string|null $id
+	 * @param  string|null $content
+	 * @param  array|null  $css
+	 * @param  array|null  $options
+	 * @param  string      $expected
+	 * @return void
+	 */
+	public function testCreateElement(
+		string $tag,
+		?string $id,
+		?string $content,
+		?array $css,
+		?array $options,
+		string $expected
+	): void {
+		$el = new Element($tag, $id ?? '', $content ?? '', $css ?? [], $options ?? []);
+		$this->assertEquals(
+			$expected,
+			$el->buildHtml(),
+			'element creation failed'
+		);
+
+		$this->assertEquals(
+			$tag,
+			$el->getTag(),
+			'get tag failed'
+		);
+
+		if ($id !== null) {
+			$this->assertEquals(
+				$id,
+				$el->getId(),
+				'get id failed'
+			);
+		}
+		if ($content !== null) {
+			$this->assertEquals(
+				$content,
+				$el->getContent(),
+				'get content failed'
+			);
+		}
+		if ($css !== null) {
+			$this->assertEquals(
+				$css,
+				$el->getCss(),
+				'get css failed'
+			);
+		}
+		if ($options !== null) {
+			$this->assertEquals(
+				$options,
+				$el->getOptions(),
+				'get options failed'
+			);
+		}
+		if (!empty($options['name'])) {
+			$this->assertEquals(
+				$options['name'],
+				$el->getName(),
+				'get name failed'
+			);
+		}
+	}
+
+	/**
+	 * css add/remove
+	 *
+	 * @cover ::getCss
+	 * @cover ::addCss
+	 * @cover ::removeCss
+	 * @testdox test handling of adding and removing css classes
+	 *
+	 * @return void
+	 */
+	public function testCssHandling(): void
+	{
+		$el = new Element('div', 'css-test', 'CSS content');
+		$this->assertEqualsCanonicalizing(
+			[],
+			$el->getCss(),
+			'check empty css'
+		);
+		$el->addCss('foo');
+		$this->assertEqualsCanonicalizing(
+			['foo'],
+			$el->getCss(),
+			'check added one css'
+		);
+		$el->removeCss('foo');
+		$this->assertEqualsCanonicalizing(
+			[],
+			$el->getCss(),
+			'check remove added css'
+		);
+		// add serveral
+		// remove some of them
+		$el->addCss('a', 'b', 'c');
+		$this->assertEqualsCanonicalizing(
+			['a', 'b', 'c'],
+			$el->getCss(),
+			'check added some css'
+		);
+		$el->removeCss('a', 'c');
+		// $this->assertArray
+		$this->assertEqualsCanonicalizing(
+			['b'],
+			$el->getCss(),
+			'check remove some css'
+		);
+		// chained add and remove
+		$el->addCss('a', 'b', 'c', 'd')->removeCss('b', 'd');
+		$this->assertEqualsCanonicalizing(
+			['a', 'c'],
+			$el->getCss(),
+			'check chain add remove some css'
+		);
+		$el->resetCss();
+		$this->assertEqualsCanonicalizing(
+			[],
+			$el->getCss(),
+			'check reset css'
+		);
+		// remove something that does not eixst
+		$el->addCss('exists');
+		$el->removeCss('not');
+		$this->assertEqualsCanonicalizing(
+			['exists'],
+			$el->getCss(),
+			'check remove not exitsing'
+		);
+	}
+
+	/**
+	 * nested test
+	 *
+	 * @testdox nested test and loop assign detection
+	 *
+	 * @return void
+	 */
+	public function testBuildNested(): void
+	{
+		Error::resetMessages();
+		$el = new Element('div', 'build-test');
+		$el_sub = new Element('div', 'sub-1');
+		$el->addSub($el_sub);
+		$this->assertEquals(
+			'<div id="build-test"><div id="sub-1"></div></div>',
+			$el->buildHtml(),
+			'nested build failed'
+		);
+		// this would create a loop, throws error
+		$this->expectException(HtmlBuilderExcpetion::class);
+		$this->expectExceptionMessage("Cannot assign Element to itself, this would create an infinite loop");
+		$el_sub->addSub($el_sub);
+		$this->assertEquals(
+			'<div id="sub-1"></div>',
+			$el_sub->buildHtml(),
+			'loop detection failed'
+		);
+		$this->assertTrue(
+			Error::hasError(),
+			'failed to throw error post loop detection'
+		);
+		$this->assertEquals(
+			[[
+				'level' => 'Error',
+				'id' => '100',
+				'message' => 'Cannot assign Element to itself, this would create an infinite loop',
+				'context' => ['tag' => 'div', 'id' => 'sub-1']
+			]],
+			Error::getMessages(),
+			'check error is 100 failed'
+		);
+		// get sub
+		$this->assertEquals(
+			[$el_sub],
+			$el->getSub(),
+			'get sub failed'
+		);
+		// reset sub
+		$el->resetSub();
+		$this->assertEquals(
+			[],
+			$el->getSub(),
+			'reset sub failed'
+		);
+	}
+
+	/**
+	 * Undocumented function
+	 *
+	 * @testdox updated nested connection
+	 *
+	 * @return void
+	 */
+	public function testNestedChangeContent(): void
+	{
+		$el = new Element('div', 'build-test');
+		$el_s_1 = new Element('div', 'sub-1');
+		$el_s_2 = new Element('div', 'sub-2');
+		$el_s_3 = new Element('div', 'sub-3');
+		$el_s_4 = new Element('div', 'sub-4');
+
+		$el->addSub($el_s_1, $el_s_2);
+		// only sub -1, -2
+		$this->assertEquals(
+			'<div id="build-test"><div id="sub-1"></div><div id="sub-2"></div></div>',
+			$el->buildHtml(),
+			'check basic nested'
+		);
+
+		// now add -3, -4 to both -1 and -2
+		$el_s_1->addSub($el_s_3, $el_s_4);
+		$el_s_2->addSub($el_s_3, $el_s_4);
+		$this->assertEquals(
+			'<div id="build-test"><div id="sub-1"><div id="sub-3"></div><div id="sub-4">'
+			. '</div></div><div id="sub-2"><div id="sub-3"></div><div id="sub-4"></div>'
+			. '</div></div>',
+			$el->buildHtml(),
+			'check nested added'
+		);
+
+		// now add some css to el_s_3, will update in both sets
+		$el_s_3->addCss('red');
+		$this->assertEquals(
+			'<div id="build-test"><div id="sub-1"><div id="sub-3" class="red"></div><div id="sub-4">'
+			. '</div></div><div id="sub-2"><div id="sub-3" class="red"></div><div id="sub-4"></div>'
+			. '</div></div>',
+			$el->buildHtml(),
+			'check nested u@dated'
+		);
+	}
+
+	/**
+	 * Undocumented function
+	 *
+	 * @testdox test change tag/id/content
+	 *
+	 * @return void
+	 */
+	public function testChangeElementData(): void
+	{
+		$el = new Element('div', 'id', 'Content');
+		// content change
+		$this->assertEquals(
+			'Content',
+			$el->getContent(),
+			'set content'
+		);
+		$el->setContent('New Content');
+		$this->assertEquals(
+			'New Content',
+			$el->getContent(),
+			'changed content'
+		);
+
+		$this->assertEquals(
+			'div',
+			$el->getTag(),
+			'set tag'
+		);
+		$el->setTag('span');
+		$this->assertEquals(
+			'span',
+			$el->getTag(),
+			'changed tag'
+		);
+
+		$this->assertEquals(
+			'id',
+			$el->getId(),
+			'set id'
+		);
+		$el->setId('id-2');
+		$this->assertEquals(
+			'id-2',
+			$el->getId(),
+			'changed id'
+		);
+	}
+
+	/**
+	 * Undocumented function
+	 *
+	 * @testdox test change options
+	 *
+	 * @return void
+	 */
+	public function testChangeOptions(): void
+	{
+		$el = new Element('button', 'id', 'Action', ['css'], ['value' => '3']);
+		$this->assertEquals(
+			['value' => '3'],
+			$el->getOptions(),
+			'set option'
+		);
+		$el->setOptions([
+			'value' => '2'
+		]);
+		$this->assertEquals(
+			['value' => '2'],
+			$el->getOptions(),
+			'changed option'
+		);
+		// add a new one
+		$el->setOptions([
+			'Foo' => 'bar',
+			'Moo' => 'cow'
+		]);
+		$this->assertEquals(
+			[
+				'value' => '2',
+				'Foo' => 'bar',
+				'Moo' => 'cow'
+			],
+			$el->getOptions(),
+			'changed option'
+		);
+	}
+
+	// build output
+	// build from array list
+
+	/**
+	 * Undocumented function
+	 *
+	 * @testdox build element tree from object
+	 *
+	 * @return void
+	 */
+	public function testBuildHtmlObject(): void
+	{
+		// build a simple block
+		// div -> div -> button
+		//     -> div -> span
+		//     -> div -> input
+		$el = new Element('div', 'master', '', ['master']);
+		$el->addSub(
+			Element::addElement(
+				new Element('div', 'div-button', '', ['dv-bt']),
+				new Element('button', 'button-id', 'Click me', ['bt-red'], [
+					'OnClick' => 'action();',
+					'value' => 'click',
+					'type' => 'button'
+				]),
+			),
+			Element::addElement(
+				new Element('div', 'div-span', '', ['dv-sp']),
+				new Element('span', 'span-id', 'Big important message<br>other', ['red']),
+			),
+			Element::addElement(
+				new Element('div', 'div-input', '', ['dv-in']),
+				new Element('input', 'input-id', '', ['in-blue'], [
+					'OnClick' => 'otherAction();',
+					'value' => 'Touch',
+					'type' => 'button'
+				]),
+			),
+		);
+		$this->assertEquals(
+			'<div id="master" class="master">'
+			. '<div id="div-button" class="dv-bt">'
+			. '<button id="button-id" name="button-id" class="bt-red" OnClick="action();" '
+			. 'value="click" type="button">Click me</button>'
+			. '</div>'
+			. '<div id="div-span" class="dv-sp">'
+			. '<span id="span-id" class="red">Big important message<br>other</span>'
+			. '</div>'
+			. '<div id="div-input" class="dv-in">'
+			. '<input id="input-id" name="input-id" '
+			. 'class="in-blue" OnClick="otherAction();" value="Touch" type="button">'
+			. '</div>'
+			. '</div>',
+			$el->buildHtml()
+		);
+	}
+
+	/**
+	 * Undocumented function
+	 *
+	 * @testdox build elements from array list
+	 *
+	 * @return void
+	 */
+	public function testbuildHtmlArray(): void
+	{
+		$this->assertEquals(
+			'<div id="id-1">A</div>'
+			. '<div id="id-2">B</div>'
+			. '<div id="id-3">C</div>',
+			Element::buildHtmlFromList([
+				new Element('div', 'id-1', 'A'),
+				new Element('div', 'id-2', 'B'),
+				new Element('div', 'id-3', 'C'),
+			])
+		);
+	}
+
+	/**
+	 * Undocumented function
+	 *
+	 * @testdox check for invalid tag detection, possible invalid id, possible invalid css
+	 *
+	 * @return void
+	 */
+	public function testInvalidElement(): void
+	{
+		Error::resetMessages();
+		$this->expectException(HtmlBuilderExcpetion::class);
+		$this->expectExceptionMessage("Could not create Element");
+		$el = new Element('');
+		$this->assertTrue(
+			Error::hasError(),
+			'failed to set error invalid tag detection'
+		);
+		$this->assertEquals(
+			[[
+				'level' => 'Error',
+				'id' => '201',
+				'message' => 'invalid or empty tag',
+				'context' => ['tag' => '']
+			]],
+			Error::getMessages(),
+			'check error message failed'
+		);
+
+		// if we set invalid tag
+		$el = new Element('div');
+		$this->expectException(HtmlBuilderExcpetion::class);
+		$this->expectExceptionMessageMatches("/^Invalid or empty tag: /");
+		$this->expectExceptionMessage("Invalid or empty tag: 123123");
+		$el->setTag('123123');
+		$this->assertTrue(
+			Error::hasError(),
+			'failed to set error invalid tag detection'
+		);
+		$this->assertEquals(
+			[[
+				'level' => 'Error',
+				'id' => '201',
+				'message' => 'invalid or empty tag',
+				'context' => ['tag' => '']
+			]],
+			Error::getMessages(),
+			'check error message failed'
+		);
+
+
+		// invalid id (warning)
+		Error::resetMessages();
+		$el = new Element('div', '-$a15');
+		$this->assertTrue(
+			Error::hasWarning(),
+			'failed to set warning invalid id detection'
+		);
+		$this->assertEquals(
+			[[
+				'level' => 'Warning',
+				'id' => '202',
+				'message' => 'possible invalid id',
+				'context' => ['id' => '-$a15', 'tag' => 'div']
+			]],
+			Error::getMessages(),
+			'check error message failed'
+		);
+
+		// invalid name
+		Error::resetMessages();
+		$el = new Element('div', 'valid', '', [], ['name' => '-$asdf&']);
+		$this->assertTrue(
+			Error::hasWarning(),
+			'failed to set warning invalid name detection'
+		);
+		$this->assertEquals(
+			[[
+				'level' => 'Warning',
+				'id' => '203',
+				'message' => 'possible invalid name',
+				'context' => ['name' => '-$asdf&', 'id' => 'valid', 'tag' => 'div']
+			]],
+			Error::getMessages(),
+			'check error message failed'
+		);
+	}
+
+	// static add element
+	// print object/array
+}
+
+// __END__

4dev/tests/Template/CoreLibsTemplateHtmlBuilderStringReplaceTest.php

@@ -0,0 +1,65 @@
+<?php
+
+declare(strict_types=1);
+
+namespace tests;
+
+use PHPUnit\Framework\TestCase;
+use CoreLibs\Template\HtmlBuilder\StringReplace;
+
+/**
+ * Test class for Template\HtmlBuilder\StringReplace
+ * @coversDefaultClass \CoreLibs\Template\HtmlBuilder\StringReplace
+ * @testdox \CoreLibs\Template\HtmlBuilder\StringReplace method tests
+ */
+final class CoreLibsTemplateHtmlBuilderStringReplaceTest extends TestCase
+{
+	/**
+	 * Undocumented function
+	 *
+	 * @covers ::replaceData
+	 * @testdox test basic replaceData
+	 *
+	 * @return void
+	 */
+	public function testReplaceData(): void
+	{
+		$html_block = <<<HTML
+<div id="{ID}" class="{CSS}">
+	{CONTENT}
+</div>
+HTML;
+
+		$this->assertEquals(
+			<<<HTML
+<div id="block-id" class="blue,red">
+	Some content here<br>with bla bla inside
+</div>
+HTML,
+			StringReplace::replaceData(
+				$html_block,
+				[
+					'ID' => 'block-id',
+					'CSS' => join(',', ['blue', 'red']),
+					'{CONTENT}' => 'Some content here<br>with bla bla inside',
+				]
+			)
+		);
+	}
+
+	/**
+	 * Undocumented function
+	 *
+	 * @testdox replaceData error
+	 *
+	 * @return void
+	 */
+	/* public function testReplaceDataErrors(): void
+	{
+		$this->expectException(HtmlBuilderExcpetion::class);
+		$this->expectExceptionMessage("Replace and content array count differ");
+		StringReplace::replaceData('<span>{FOO}</span>', ['{FOO}', '{BAR}'], ['foo']);
+	} */
+}
+
+// __END__

www/admin/class_test.datetime.php

@@ -143,6 +143,26 @@ print "DATE-dow[$date];invalid: " . DateTime::setWeekdayNameFromDate($date) . "<
 print "DATE-dow[$date],long;invalid: " . DateTime::setWeekdayNameFromDate($date, true) . "<br>";
 print "DOW-date[$date];invalid: " . DateTime::setWeekdayNumberFromDate($date) . "<br>";
 
+// check date range includes a weekend
+// does not:
+$start_date = '2023-07-03';
+$end_date = '2023-07-05';
+print "Has Weekend: " . $start_date . " ~ " . $end_date . ": "
+	. Dgs::prBl(DateTime::dateRangeHasWeekend($start_date, $end_date)) . "<br>";
+$start_date = '2023-07-03';
+$end_date = '2023-07-10';
+print "Has Weekend: " . $start_date . " ~ " . $end_date . ": "
+	. Dgs::prBl(DateTime::dateRangeHasWeekend($start_date, $end_date)) . "<br>";
+$start_date = '2023-07-03';
+$end_date = '2023-07-31';
+print "Has Weekend: " . $start_date . " ~ " . $end_date . ": "
+	. Dgs::prBl(DateTime::dateRangeHasWeekend($start_date, $end_date)) . "<br>";
+$start_date = '2023-07-01';
+$end_date = '2023-07-03';
+print "Has Weekend: " . $start_date . " ~ " . $end_date . ": "
+	. Dgs::prBl(DateTime::dateRangeHasWeekend($start_date, $end_date)) . "<br>";
+
+
 print "</body></html>";
 
 // __END__

www/admin/class_test.html_build.block.php

@@ -0,0 +1,83 @@
+<?php // phpcs:ignore warning
+
+/**
+ * @phan-file-suppress PhanTypeSuspiciousStringExpression
+ */
+
+declare(strict_types=1);
+
+error_reporting(E_ALL | E_STRICT | E_ERROR | E_WARNING | E_PARSE | E_COMPILE_ERROR);
+
+ob_start();
+
+// basic class test file
+define('USE_DATABASE', false);
+// sample config
+require 'config.php';
+// define log file id
+$LOG_FILE_ID = 'classTest-html_build-block';
+ob_end_flush();
+
+use CoreLibs\Template\HtmlBuilder\Block;
+
+$log = new CoreLibs\Logging\Logging([
+	'log_folder' => BASE . LOG,
+	'log_file_id' => $LOG_FILE_ID,
+	'log_per_date' => true,
+]);
+
+// define a list of from to color sets for conversion test
+
+$PAGE_NAME = 'TEST CLASS: HTML BUILD: BLOCK';
+print "<!DOCTYPE html>";
+print "<html><head><title>" . $PAGE_NAME . "</title><head>";
+print "<body>";
+print '<div><a href="class_test.php">Class Test Master</a></div>';
+print '<div><h1>' . $PAGE_NAME . '</h1></div>';
+
+$el = Block::cel('div', 'el-1', 'Content', ['red'], ['onClick' => 'javascript:alert(\'JS alert\');']);
+
+print "<pre>" . htmlentities(Block::buildHtml($el)) . "</pre>";
+
+$el_a = Block::cel('div', 'u-id', '', ['base', 'cool']);
+$el_a_1 = Block::cel('span', 's-id-1', 'Span A', ['bold']);
+$el_a_2 = Block::cel('span', 's-id-2', 'Span B');
+$el_a_3 = Block::cel('a', 'link-a', 'Title', ['l-highlight'], ['OnClick' => 'Foo();']);
+$el_a_2 = Block::aelx($el_a_2, $el_a_3);
+// css changes before added to array
+$el_a_1 = Block::acssel($el_a_1, 'italic', 'green', 'italic', 'font-large');
+$el_a_1 = Block::rcssel($el_a_1, 'green');
+// switch
+$el_a_1 = Block::scssel($el_a_1, ['one', 'two', 'three'], ['three']);
+// this will add el_a_2 to the el_a block
+$el_a_1 = Block::aelx($el_a_1, $el_a_2);
+$el_a = Block::aelx($el_a, $el_a_1, $el_a_2);
+
+// this will not update el_a
+// $el_a_1 = Block::aelx($el_a_1, $el_a_2);
+
+$el_a_list = [];
+$el_a_list[] = Block::cel('foo', 'foo-A');
+$el_a_list[] = Block::cel('bar', 'foo-B');
+$el_a_list[] = Block::cel('baz', 'foo-C');
+$el_a_list[] = Block::cel('br');
+$el_a_list[] = Block::cel('input');
+
+echo "<hr>";
+print "EL_A: <pre>" . print_r($el_a, true) . "</pre>";
+
+echo "<hr>";
+print "phfo(\$el_o): <pre>" . htmlentities(Block::buildHtml($el_a, true)) . "</pre>";
+echo "<hr>";
+print "phfa(\$el_list): <pre>" . htmlentities(Block::buildHtmlFromList($el_a_list, true)) . "</pre>";
+
+echo "<hr>";
+// self loop test (will not trigger, are arrays)
+$el_s = Block::cel('div', 'id-s', 'Self', []);
+$el_s = Block::aelx($el_s, $el_s);
+
+print "phfo(\$el_): <pre>" . htmlentities(Block::buildHtml($el_s, true)) . "</pre>";
+
+print "</body></html>";
+
+// __END__

www/admin/class_test.html_build.element.php

@@ -0,0 +1,142 @@
+<?php // phpcs:ignore warning
+
+/**
+ * @phan-file-suppress PhanTypeSuspiciousStringExpression
+ */
+
+declare(strict_types=1);
+
+error_reporting(E_ALL | E_STRICT | E_ERROR | E_WARNING | E_PARSE | E_COMPILE_ERROR);
+
+ob_start();
+
+// basic class test file
+define('USE_DATABASE', false);
+// sample config
+require 'config.php';
+// define log file id
+$LOG_FILE_ID = 'classTest-html_build';
+ob_end_flush();
+
+use CoreLibs\Template\HtmlBuilder\Element;
+use CoreLibs\Template\HtmlBuilder\General\Error;
+use CoreLibs\Template\HtmlBuilder\General\HtmlBuilderExcpetion;
+use CoreLibs\Debug\Support;
+
+$log = new CoreLibs\Logging\Logging([
+	'log_folder' => BASE . LOG,
+	'log_file_id' => $LOG_FILE_ID,
+	'log_per_date' => true,
+]);
+
+// define a list of from to color sets for conversion test
+
+$PAGE_NAME = 'TEST CLASS: HTML BUILD';
+print "<!DOCTYPE html>";
+print "<html><head><title>" . $PAGE_NAME . "</title><head>";
+print "<body>";
+print '<div><a href="class_test.php">Class Test Master</a></div>';
+print '<div><h1>' . $PAGE_NAME . '</h1></div>';
+
+$el = new Element('div', 'el-1', 'Content', ['red'], ['onClick' => 'javascript:alert(\'JS alert\');']);
+
+print "<pre>" . htmlentities($el->buildHtml()) . "</pre>";
+
+$el_o = new Element('div', 'u-id', '', ['base', 'cool']);
+$el_o_1 = new Element('span', 's-id-1', 'Span A', ['bold']);
+$el_o_2 = new Element('span', 's-id-2', 'Span B');
+$el_o_3 = new Element('a', 'link-a', 'Title', ['l-highlight'], ['OnClick' => 'Foo();']);
+$el_o_2->addSub($el_o_3);
+$el_o->addSub($el_o_1, $el_o_2);
+
+$el_o_1->addCss('italic', 'green', 'italic', 'font-large')
+	->removeCss('green');
+
+$el_o_2->addCss('wrong-css')
+	->removeCss('wrong-css', 'correct-css');
+$el_o_2->addCss('a', 'b')->removeCss('correct-css');
+
+$el_o_1->addSub($el_o_2);
+
+// var_dump($el2);
+
+$el_o_list = [];
+$el_o_list[] = new Element('foo', 'foo-A');
+$el_o_list[] = new Element('bar', 'foo-B');
+$el_o_list[] = new Element('baz', 'foo-C');
+$el_o_list[] = new Element('br');
+$el_o_list[] = new Element('input', 'tag', '', [], ['name' => 'foo', 'value' => 'ABC']);
+
+// $el2->resetSub();
+// var_dump($el2);
+echo "<hr>";
+print "EL_O: <pre>" . print_r($el_o, true) . "</pre>";
+
+echo "<hr>";
+print "buildHtml(): <pre>" . htmlentities($el_o->buildHtml()) . "</pre>";
+echo "<hr>";
+print "phfo(\$el_o): <pre>" . htmlentities($el_o::printHtmlFromObject($el_o, true)) . "</pre>";
+echo "<hr>";
+print "phfa(\$el_list): <pre>" . htmlentities($el_o::buildHtmlFromList($el_o_list, true)) . "</pre>";
+
+echo "<hr>";
+
+// self loop
+
+$el_s = new Element('div', 'id-s', 'Self');
+try {
+	$el_s->addSub($el_s, new Element('span', '', 'Span'));
+} catch (HtmlBuilderExcpetion $e) {
+	print "E: " . $e->getMessage() . " | " . $e->getTraceAsString() . "<br>";
+}
+
+// var_dump($el_s);
+print "el_s, buildHtml(): <pre>" . htmlentities($el_s->buildHtml()) . "</pre>";
+
+$el_s_2 = new Element('div', 'id-s', 'Self', []);
+$el_s_2->addSub(
+	new Element('span', 's-1', 's 1'),
+	new Element('span', 's-2', 's 2'),
+);
+
+$el_s_3 = new Element('div', 'id-3', 'ID 3');
+try {
+	$el_s_3->addSub($el_s_2);
+	$el_s_2->addSub($el_s_2);
+} catch (HtmlBuilderExcpetion $e) {
+	print "E: " . $e->getMessage() . " | " . $e->getTraceAsString() . "<br>";
+}
+
+// print "<pre>" . var_export($el_s_3, true) . "</pre>";
+
+print "el_s_3, buildHtml(): <pre>" . htmlentities($el_s_3->buildHtml()) . "</pre>";
+
+echo "<hr>";
+Error::resetMessages();
+try {
+	$el_er = new Element('');
+} catch (HtmlBuilderExcpetion $e) {
+	print "E: " . $e->getMessage() . " | " . $e->getTraceAsString() . "<br>";
+	if ($e->getPrevious() !== null) {
+		print "E: " . $e->getPrevious()->getMessage() . " | " . $e->getPrevious()->getTraceAsString() . "<br>";
+	}
+}
+print "Errors: <pre>" . print_r(Error::getMessages(), true) . "</pre>";
+print "Warning: " . Support::printToString(Error::hasWarning()) . "<br>";
+print "Error: " . Support::printToString(Error::hasError()) . "<br>";
+Error::resetMessages();
+try {
+	$el_er = new Element('123123');
+} catch (HtmlBuilderExcpetion $e) {
+	print "E: " . $e->getMessage() . " | " . $e->getTraceAsString() . "<br>";
+	if ($e->getPrevious() !== null) {
+		print "E: " . $e->getPrevious()->getMessage() . " | " . $e->getPrevious()->getTraceAsString() . "<br>";
+	}
+}
+print "Errors: <pre>" . print_r(Error::getMessages(), true) . "</pre>";
+print "Warning: " . Support::printToString(Error::hasWarning()) . "<br>";
+print "Error: " . Support::printToString(Error::hasError()) . "<br>";
+
+print "</body></html>";
+
+// __END__

www/admin/class_test.html_build.replace.php

@@ -0,0 +1,83 @@
+<?php // phpcs:ignore warning
+
+/**
+ * @phan-file-suppress PhanTypeSuspiciousStringExpression
+ */
+
+declare(strict_types=1);
+
+error_reporting(E_ALL | E_STRICT | E_ERROR | E_WARNING | E_PARSE | E_COMPILE_ERROR);
+
+ob_start();
+
+// basic class test file
+define('USE_DATABASE', false);
+// sample config
+require 'config.php';
+// define log file id
+$LOG_FILE_ID = 'classTest-html_build-string-replace';
+ob_end_flush();
+
+use CoreLibs\Template\HtmlBuilder\StringReplace;
+
+$log = new CoreLibs\Logging\Logging([
+	'log_folder' => BASE . LOG,
+	'log_file_id' => $LOG_FILE_ID,
+	'log_per_date' => true,
+]);
+
+// define a list of from to color sets for conversion test
+
+$PAGE_NAME = 'TEST CLASS: HTML BUILD: STRING REPLACE';
+print "<!DOCTYPE html>";
+print "<html><head><title>" . $PAGE_NAME . "</title><head>";
+print "<body>";
+print '<div><a href="class_test.php">Class Test Master</a></div>';
+print '<div><h1>' . $PAGE_NAME . '</h1></div>';
+
+$html_block = <<<HTML
+<div id="{ID}" class="{CSS}">
+	{CONTENT}
+</div>
+HTML;
+
+print "<pre>" . htmlentities(StringReplace::replaceData(
+	$html_block,
+	[
+		'ID' => 'block-id',
+		'CSS' => join(',', ['blue', 'red']),
+		'{CONTENT}' => 'Some content here<br>with bla bla inside'
+	]
+)) . "</pre>";
+
+StringReplace::loadElements(
+	['foo', $html_block],
+	['bar', <<<HTML
+<span id="{ID}">{CONTENT}</span>
+HTML]
+);
+
+print "Get: <pre>" . htmlentities(StringReplace::getElement('bar') ?: '') . '</pre>';
+
+print "Build element: <pre>" . htmlentities(StringReplace::buildElement(
+	'bar',
+	[
+		'ID}' => 'new-id',
+		'{CONTENT' => 'Test cow 日本語'
+	]
+)) . '</pre>' ;
+
+print "Build element as replace: <pre>" . htmlentities(StringReplace::buildElement(
+	'bar',
+	['
+		ID}' => 'diff-id',
+		'{CONTENT' => 'Test cow 日本語. More text plus'
+	],
+	'rpl-1'
+)) . '</pre>' ;
+
+print "Get replacement: <pre>" . htmlentities(StringReplace::getReplaceBlock('rpl-1')) . "</pre>";
+
+print "</body></html>";
+
+// __END__

www/admin/class_test.php

@@ -81,6 +81,9 @@ $test_files = [
 	'class_test.encryption.php' => 'Class Test: ENCRYPTION',
 	'class_test.math.php' => 'Class Test: MATH',
 	'class_test.html.php' => 'Class Test: HTML/ELEMENTS',
+	'class_test.html_build.element.php' => 'Class Test: HTML BUILDER: ELEMENT',
+	'class_test.html_build.block.php' => 'Class Test: HTML BUILDER: BLOCK',
+	'class_test.html_build.replace.php' => 'Class Test: HTML BUILDER: STRING REPLACE',
 	'class_test.email.php' => 'Class Test: EMAIL',
 	'class_test.create_email.php' => 'Class Test: CREATE EMAIL',
 	'class_test.uids.php' => 'Class Test: UIDS',

www/configs/config.master.php

@@ -222,7 +222,17 @@ if ($is_secure) {
 }
 // define the db config set name, the db config and the db schema
 define('DB_CONFIG_NAME', $SITE_CONFIG[HOST_NAME]['db_host'] ?? '');
-define('DB_CONFIG', $DB_CONFIG[DB_CONFIG_NAME] ?? []);
+define('DB_CONFIG', $DB_CONFIG[DB_CONFIG_NAME] ?? [
+	'db_name' => '',
+	'db_user' => '',
+	'db_pass' => '',
+	'db_host' => '',
+	'db_port' => 5432,
+	'db_schema' => '',
+	'db_encoding' => '',
+	'db_type' => '',
+	'db_ssl' => ''
+]);
 // because we can't change constant, but we want to for db debug flag
 $GLOBALS['DB_CONFIG_SET'] = DB_CONFIG;
 // define('DB_CONFIG_TARGET', SITE_CONFIG[$HOST_NAME]['db_host_target']);

www/configs/config.other.php

@@ -10,6 +10,9 @@
 
 declare(strict_types=1);
 
+// style sheet for the edit base interface
+define('EDIT_BASE_STYLESHEET', 'edit.css');
+
 // define('SOME_ID', <SOME VALUE>);
 
 /************* CONVERT *******************/

www/includes/admin_header.php

@@ -87,7 +87,7 @@ $l10n = new \CoreLibs\Language\L10n(
 	$locale['locale'],
 	$locale['domain'],
 	$locale['path'],
-	$locale['encoding']
+	$locale['encoding'],
 );
 
 // create smarty object

www/includes/edit_base.php

@@ -86,7 +86,7 @@ $edit_base->editBaseRun(
 	BASE . INCLUDES . TEMPLATES . CONTENT_PATH,
 	BASE . TEMPLATES_C,
 	BASE . CACHE,
-	ADMIN_STYLESHEET,
+	EDIT_BASE_STYLESHEET,
 	DEFAULT_ENCODING,
 	LAYOUT . CSS,
 	LAYOUT . JS,

www/layout/admin/javascript/edit.jq.js

@@ -965,6 +965,44 @@ function scssel(_element, rcss, acss) // eslint-disable-line no-unused-vars
  */
 function phfo(tree)
 {
+	let name_elements = [
+		'button',
+		'fieldset',
+		'form',
+		'iframe',
+		'input',
+		'map',
+		'meta',
+		'object',
+		'output',
+		'param',
+		'select',
+		'textarea',
+	];
+	let skip_options = [
+		'id',
+		'name',
+		'class',
+	];
+	let no_close = [
+		'input',
+		'br',
+		'img',
+		'hr',
+		'area',
+		'col',
+		'keygen',
+		'wbr',
+		'track',
+		'source',
+		'param',
+		'command',
+		// only in header
+		'base',
+		'meta',
+		'link',
+		'embed',
+	];
 	// holds the elements
 	var content = [];
 	// main part line
@@ -974,7 +1012,7 @@ function phfo(tree)
 	if (tree.id) {
 		line += ' id="' + tree.id + '"';
 		// if anything input (input, textarea, select then add name too)
-		if (['input', 'textarea', 'select', 'button'].includes(tree.tag)) {
+		if (name_elements.includes(tree.tag)) {
 			line += ' name="' + (tree.name ? tree.name : tree.id) + '"';
 		}
 	}
@@ -992,7 +1030,7 @@ function phfo(tree)
 	if (isObject(tree.options)) {
 		// ignores id, name, class as key
 		for (const [key, item] of Object.entries(tree.options)) {
-			if (!['id', 'name', 'class'].includes(key)) {
+			if (!skip_options.includes(key)) {
 				line += ' ' + key + '="' + item + '"';
 			}
 		}
@@ -1016,9 +1054,7 @@ function phfo(tree)
 	}
 	// if not input, image or br, then close
 	if (
-		tree.tag != 'input' ||
-		tree.tag != 'img' ||
-		tree.tag != 'br'
+		!no_close.includes(tree.tag)
 	) {
 		content.push('</' + tree.tag + '>');
 	}

www/lib/CoreLibs/Admin/Backend.php

@@ -164,6 +164,10 @@ class Backend
 			);
 		}
 		$this->default_acl = $set_default_acl_level ?? DEFAULT_ACL_LEVEL;
+		// if negative or larger than 100, reset to 0
+		if ($this->default_acl < 0 || $this->default_acl > 100) {
+			$this->default_acl = 0;
+		}
 
 		// queue key
 		if (preg_match("/^(add|save|delete|remove|move|up|down|push_live)$/", $this->action)) {

www/lib/CoreLibs/Combined/DateTime.php

@@ -452,6 +452,31 @@ class DateTime
 			return $days;
 		}
 	}
+
+	/**
+	 * check if a weekend day (sat/sun) is in the given date range
+	 * Can have time too, but is not needed
+	 *
+	 * @param  string $start_date Y-m-d
+	 * @param  string $end_date   Y-m-d
+	 * @return bool               True for has weekend, False for has not
+	 */
+	public static function dateRangeHasWeekend(
+		string $start_date,
+		string $end_date,
+	): bool {
+		$dd_start = new \DateTime($start_date);
+		$dd_end = new \DateTime($end_date);
+		if (
+			// starts with a weekend
+			$dd_start->format('N') >= 6 ||
+			// start day plus diff will be 6 and so fall into a weekend
+			((int)$dd_start->format('w') + $dd_start->diff($dd_end)->days) >= 6
+		) {
+			return true;
+		}
+		return false;
+	}
 }
 
 // __END__

www/lib/CoreLibs/DB/IO.php

@@ -309,7 +309,7 @@ class IO
 	// basic vars
 	// the dbh handler, if disconnected by command is null, bool:false on error,
 	/** @var \PgSql\Connection|false|null */
-	private \PgSql\Connection|false|null $dbh;
+	private \PgSql\Connection|false|null $dbh = null;
 	/** @var bool DB_DEBUG ... (if set prints out debug msgs) */
 	private bool $db_debug = false;
 	/** @var string the DB connected to */
@@ -814,13 +814,13 @@ class IO
 		switch ($id) {
 			case 'DB_ERROR':
 				$this->log->error(
-					$debug_id . ' :' . $prefix . $error_string,
+					$prefix . $error_string,
 					$context
 				);
 				break;
 			case 'DB_WARNING':
 				$this->log->warning(
-					$debug_id . ' :' . $prefix . $error_string,
+					$prefix . $error_string,
 					$context
 				);
 				break;

www/lib/CoreLibs/Template/HtmlBuilder/Block.php

@@ -0,0 +1,264 @@
+<?php // phpcs:disable Generic.Files.LineLength
+
+/**
+ * AUTOR: Clemens Schwaighofer
+ * CREATED: 2023/6/1
+ * DESCRIPTION:
+ * html builder: array
+ * static build for array lists (not objects)
+ *
+ * Recommended to use the Object one or for speed the String Replace
+*/
+
+namespace CoreLibs\Template\HtmlBuilder;
+
+use CoreLibs\Template\HtmlBuilder\General\Settings;
+use CoreLibs\Template\HtmlBuilder\General\Error;
+use CoreLibs\Template\HtmlBuilder\General\HtmlBuilderExcpetion;
+
+class Block
+{
+	/**
+	 * Undocumented function
+	 *
+	 * @param  string $tag
+	 * @param  string $id
+	 * @param  string $content
+	 * @param  array<string> $css,
+	 * @param  array<string,string>  $options
+	 * @return array{tag:string,id:string,name:string,content:string,css:array<string>,options:array<string,string>,sub:array<mixed>}
+	 * @throws HtmlBuilderExcpetion
+	 */
+	public static function cel(
+		string $tag,
+		string $id = '',
+		string $content = '',
+		array $css = [],
+		array $options = []
+	): array {
+		if (!preg_match("/^[A-Za-z]+$/", $tag)) {
+			Error::setError(
+				'201',
+				'invalid or empty tag',
+				['tag' => $tag]
+			);
+			throw new HtmlBuilderExcpetion('Invalid or empty tag');
+		}
+		return [
+			'tag' => $tag,
+			'id' => $id,
+			'name' => $options['name'] ?? '',
+			'content' => $content,
+			'css' => $css,
+			'options' => $options,
+			'sub' => [],
+		];
+	}
+
+	/**
+	 * Search element tree for id and add
+	 * if id is empty add at current
+	 *
+	 * @param  array{tag:string,id:string,name:string,content:string,css:array<string>,options:array<string,string>,sub:array<mixed>} $base
+	 * @param  array{tag:string,id:string,name:string,content:string,css:array<string>,options:array<string,string>,sub:array<mixed>} $attach
+	 * @param  string  $id
+	 * @return array{tag:string,id:string,name:string,content:string,css:array<string>,options:array<string,string>,sub:array<mixed>}
+	 */
+	public static function ael(
+		array $base,
+		array $attach,
+		string $id = ''
+	): array {
+		// no id or matching id
+		if (
+			empty($id) ||
+			$base['id'] == $id
+		) {
+			self::addSub($base, $attach);
+			return $base;
+		}
+		// find id in 'id' in all 'sub'
+		foreach ($base['sub'] as $el) {
+			$el = self::ael($el, $attach, $id);
+		}
+
+		return $base;
+	}
+
+	/**
+	 * Undocumented function
+	 *
+	 * @param  array{tag:string,id:string,name:string,content:string,css:array<string>,options:array<string,string>,sub:array<mixed>} $base
+	 * @param  array{tag:string,id:string,name:string,content:string,css:array<string>,options:array<string,string>,sub:array<mixed>} ...$attach
+	 * @return array{tag:string,id:string,name:string,content:string,css:array<string>,options:array<string,string>,sub:array<mixed>}
+	 */
+	public static function aelx(
+		array $base,
+		array ...$attach
+	): array {
+		$base = self::addSub($base, ...$attach);
+		return $base;
+	}
+
+	/**
+	 * Undocumented function
+	 *
+	 * @param  array{tag:string,id:string,name:string,content:string,css:array<string>,options:array<string,string>,sub:array<mixed>} $element
+	 * @param  array{tag:string,id:string,name:string,content:string,css:array<string>,options:array<string,string>,sub:array<mixed>} $sub
+	 * @return array{tag:string,id:string,name:string,content:string,css:array<string>,options:array<string,string>,sub:array<mixed>}
+	 */
+	public static function addSub(array $element, array ...$sub): array
+	{
+		if (!isset($element['sub'])) {
+			$element['sub'] = [];
+		}
+		array_push($element['sub'], ...$sub);
+		return $element;
+	}
+
+	/**
+	 * Undocumented function
+	 *
+	 * @param  array{tag:string,id:string,name:string,content:string,css:array<string>,options:array<string,string>,sub:array<mixed>} $element
+	 * @return array{tag:string,id:string,name:string,content:string,css:array<string>,options:array<string,string>,sub:array<mixed>}
+	 */
+	public static function resetSub(array $element): array
+	{
+		$element['sub'] = [];
+		return $element;
+	}
+
+	// CSS Elements
+
+	/**
+	 * Undocumented function
+	 *
+	 * @param  array{tag:string,id:string,name:string,content:string,css:array<string>,options:array<string,string>,sub:array<mixed>} $element
+	 * @param  string ...$css
+	 * @return array{tag:string,id:string,name:string,content:string,css:array<string>,options:array<string,string>,sub:array<mixed>}
+	 */
+	public static function acssel(array $element, string ...$css): array
+	{
+		$element['css'] = array_unique(array_merge($element['css'] ?? [], $css));
+		return $element;
+	}
+
+	/**
+	 * Undocumented function
+	 *
+	 * @param  array{tag:string,id:string,name:string,content:string,css:array<string>,options:array<string,string>,sub:array<mixed>} $element
+	 * @param  string ...$css
+	 * @return array{tag:string,id:string,name:string,content:string,css:array<string>,options:array<string,string>,sub:array<mixed>}
+	 */
+	public static function rcssel(array $element, string ...$css): array
+	{
+		$element['css'] = array_diff($element['css'] ?? [], $css);
+		return $element;
+	}
+
+	/**
+	 * Undocumented function
+	 * scssel (switch) is not supported
+	 * use rcssel -> acssel
+	 *
+	 * @param  array{tag:string,id:string,name:string,content:string,css:array<string>,options:array<string,string>,sub:array<mixed>} $element
+	 * @param  array<string> $rcss
+	 * @param  array<string> $acss
+	 * @return array{tag:string,id:string,name:string,content:string,css:array<string>,options:array<string,string>,sub:array<mixed>}
+	 */
+	public static function scssel(array $element, array $rcss, array $acss): array
+	{
+		return self::acssel(
+			self::rcssel($element, ...$rcss),
+			...$acss
+		);
+	}
+
+	/**
+	 * Undocumented function
+	 * alias phfo
+	 *
+	 * @param  array{tag:string,id:string,name:string,content:string,css:array<string>,options:array<string,string>,sub:array<mixed>} $tree
+	 * @param  bool         $add_nl [default=false]
+	 * @return string
+	 */
+	public static function buildHtml(array $tree, bool $add_nl = false): string
+	{
+		if (empty($tree['tag'])) {
+			return '';
+		}
+		// print "D01: " . microtime(true) . "<br>";
+		$line = '<' . $tree['tag'];
+
+		if (!empty($tree['id'])) {
+			$line .= ' id="' . $tree['id'] . '"';
+			if (in_array($tree['tag'], Settings::NAME_ELEMENTS)) {
+				$line .= ' name="'
+					. (!empty($tree['name']) ? $tree['name'] : $tree['id'])
+					. '"';
+			}
+		}
+		if (count($tree['css'])) {
+			$line .= ' class="' . join(' ', $tree['css']) . '"';
+		}
+		foreach ($tree['options'] ?? [] as $key => $item) {
+			if (in_array($key, Settings::SKIP_OPTIONS)) {
+				continue;
+			}
+			$line .= ' ' . $key . '="' . $item . '"';
+		}
+		$line .= '>';
+		if (!empty($tree['content'])) {
+			$line .= $tree['content'];
+		}
+		// sub nodes
+		foreach ($tree['sub'] ?? [] as $sub) {
+			if ($add_nl === true) {
+				$line .= "\n";
+			}
+			$line .= self::buildHtml($sub, $add_nl);
+			if ($add_nl === true) {
+				$line .= "\n";
+			}
+		}
+
+		// close line if needed
+		if (!in_array($tree['tag'], Settings::NO_CLOSE)) {
+			$line .= '</' . $tree['tag'] . '>';
+		}
+
+		return $line;
+	}
+
+	/**
+	 * Undocumented function
+	 * alias phfa
+	 *
+	 * @param  array<array{tag:string,id:string,name:string,content:string,css:array<string>,options:array<string,string>,sub:array<mixed>}> $list
+	 * @param  bool         $add_nl [default=false]
+	 * @return string
+	 */
+	public static function buildHtmlFromList(array $list, bool $add_nl = false): string
+	{
+		$output = '';
+		foreach ($list as $el) {
+			$output .= self::buildHtml($el, $add_nl);
+		}
+		return $output;
+	}
+
+	/**
+	 * Undocumented function
+	 * wrapper for buildHtmlFromList
+	 *
+	 * @param  array<array{tag:string,id:string,name:string,content:string,css:array<string>,options:array<string,string>,sub:array<mixed>}> $list                   array of Elements to build string from
+	 * @param  bool           $add_nl [default=false] Optional output string line break
+	 * @return string         build html as string
+	 */
+	public static function printHtmlFromArray(array $list, bool $add_nl = false): string
+	{
+		return self::buildHtmlFromList($list, $add_nl);
+	}
+}
+
+// __END__

www/lib/CoreLibs/Template/HtmlBuilder/Element.php

@@ -0,0 +1,559 @@
+<?php
+
+/**
+ * AUTOR: Clemens Schwaighofer
+ * CREATED: 2023/6/1
+ * DESCRIPTION:
+ * html builder: element
+ * nested and connected objects
+*/
+
+declare(strict_types=1);
+
+namespace CoreLibs\Template\HtmlBuilder;
+
+use CoreLibs\Template\HtmlBuilder\General\Settings;
+use CoreLibs\Template\HtmlBuilder\General\Error;
+use CoreLibs\Template\HtmlBuilder\General\HtmlBuilderExcpetion;
+
+class Element
+{
+	/** @var string */
+	private string $tag = '';
+	/** @var string */
+	private string $id = '';
+	/** @var string */
+	private string $name = '';
+	/** @var string */
+	private string $content = '';
+	/** @var array<string> */
+	private array $css = [];
+	/** @var array<string,mixed> */
+	private array $options = [];
+	/** @var array<Element> list of elements */
+	private array $sub = [];
+
+	/**
+	 * create new html element
+	 *
+	 * @param  string $tag                   html tag (eg div, button, etc)
+	 * @param  string $id                    html tag id, used also for name if name
+	 *                                       not set in $options
+	 * @param  string $content               content text inside, eg <div>Content</div>
+	 *                                       if sub elements exist, they are added after content
+	 * @param  array<string> $css            array of css names, put style in $options
+	 * @param  array<string,string> $options Additional element options in
+	 *                                       key = value format
+	 *                                       eg: onClick => 'something();'
+	 *                                       id, css are skipped
+	 *                                       name only set on input/button
+	 * @throws HtmlBuilderExcpetion
+	 */
+	public function __construct(
+		string $tag,
+		string $id = '',
+		string $content = '',
+		array $css = [],
+		array $options = []
+	) {
+		// exit if not valid tag
+		try {
+			$this->setTag($tag);
+		} catch (HtmlBuilderExcpetion $e) {
+			throw new HtmlBuilderExcpetion('Could not create Element', 0, $e);
+		}
+		$this->setId($id);
+		$this->setName($options['name'] ?? '');
+		$this->setContent($content);
+		$this->addCss(...$css);
+		$this->setOptions($options);
+	}
+
+	/**
+	 * set tag
+	 *
+	 * @param  string $tag
+	 * @return void
+	 * @throws HtmlBuilderExcpetion
+	 */
+	public function setTag(string $tag): void
+	{
+		// tag must be letters only
+		if (!preg_match("/^[A-Za-z]+$/", $tag)) {
+			Error::setError(
+				'201',
+				'invalid or empty tag',
+				['tag' => $tag]
+			);
+			throw new HtmlBuilderExcpetion('Invalid or empty tag: ' . $tag);
+		}
+		$this->tag = $tag;
+	}
+
+	/**
+	 * get the tag name
+	 *
+	 * @return string HTML element tag
+	 */
+	public function getTag(): string
+	{
+		return $this->tag;
+	}
+
+	/**
+	 * set the element id
+	 *
+	 * @param  string $id
+	 * @return void
+	 */
+	public function setId(string $id): void
+	{
+		// invalid id and name check too
+		// be strict: [a-zA-Z0-9], -, _
+		// cannot start with digit, two hyphens or a hyphen with a digit:
+		// 0abc
+		// __abc
+		// _0abc
+		if (
+			!empty($id) &&
+			!preg_match("/^[A-Za-z][\w-]*$/", $id)
+		) {
+			Error::setWarning(
+				'202',
+				'possible invalid id',
+				['id' => $id, 'tag' => $this->getTag()]
+			);
+			// TODO: shoud throw error
+		}
+		$this->id = $id;
+	}
+
+	/**
+	 * get the html tag id
+	 *
+	 * @return string HTML element id
+	 */
+	public function getId(): string
+	{
+		return $this->id;
+	}
+
+	/**
+	 * Set name for elements
+	 * only for elements that need it (input/button/form)
+	 *
+	 * @param  string $name
+	 * @return void
+	 */
+	public function setName(string $name): void
+	{
+		if (
+			!empty($name) &&
+			!preg_match("/^[A-Za-z][\w-]*$/", $name)
+		) {
+			Error::setWarning(
+				'203',
+				'possible invalid name',
+				['name' => $name, 'id' => $this->getId(), 'tag' => $this->getTag()]
+			);
+			// TODO: shoud throw error
+		}
+		$this->name = $name;
+	}
+
+	/**
+	 * get the name if set
+	 *
+	 * @return string Optional HTML name (eg for input)
+	 */
+	public function getName(): string
+	{
+		return $this->name;
+	}
+
+	/**
+	 * Set new content for element
+	 *
+	 * @param  string $content
+	 * @return void
+	 */
+	public function setContent(string $content): void
+	{
+		$this->content = $content;
+	}
+
+	/**
+	 * get the elment text content (not sub elements)
+	 *
+	 * @return string HTML content text as is
+	 */
+	public function getContent(): string
+	{
+		return $this->content;
+	}
+
+	/**
+	 * set or update options
+	 *
+	 * @param  array<string,mixed> $options
+	 * @return void
+	 */
+	public function setOptions(array $options): void
+	{
+		foreach ($options as $key => $value) {
+			if (empty($key)) {
+				Error::setError(
+					'110',
+					'Cannot set option with empty key',
+					['id' => $this->getId(), 'tag' => $this->getTag()]
+				);
+				// TODO: shoud throw error
+				continue;
+			}
+			// if data is null
+			if ($value === null) {
+				if (isset($this->options[$key])) {
+					unset($this->options[$key]);
+				} else {
+					Error::setError(
+						'210',
+						'Cannot set option with null value',
+						['id' => $this->getId(), 'tag' => $this->getTag()]
+					);
+				}
+				// TODO: shoud throw error
+				continue;
+			}
+			$this->options[$key] = $value;
+		}
+	}
+
+	/**
+	 * get the options array
+	 * also holds "name" option
+	 * anything like: style, javascript, value or any other html tag option
+	 * right side can be empty but not null
+	 *
+	 * @return array<string,string> get options as list html option name and value
+	 */
+	public function getOptions(): array
+	{
+		return $this->options;
+	}
+
+	// Sub Elements
+
+	/**
+	 * get the sub elements (array of Elements)
+	 *
+	 * @return array<Element> Array of Elements (that can have sub elements)
+	 */
+	public function getSub(): array
+	{
+		return $this->sub;
+	}
+
+	/**
+	 * add one or many sub elements (add at the end)
+	 *
+	 * @param  Element $sub One or many elements to add
+	 * @return void
+	 * @throws HtmlBuilderExcpetion
+	 */
+	public function addSub(Element ...$sub): void
+	{
+		foreach ($sub as $_sub) {
+			// if one of the elements is the same as this class, ignore it
+			// with this we avoid self reference loop
+			if ($_sub == $this) {
+				Error::setError(
+					'100',
+					'Cannot assign Element to itself, this would create an infinite loop',
+					['id' => $this->getId(), 'tag' => $this->getTag()]
+				);
+				throw new HtmlBuilderExcpetion('Cannot assign Element to itself, this would create an infinite loop');
+			}
+			array_push($this->sub, $_sub);
+		}
+	}
+
+	/**
+	 * Remove an element from the sub array
+	 * By pos in array or id set on first level
+	 *
+	 * @param  int|string $id String id name or int pos number in array
+	 * @return void
+	 */
+	public function removeSub(int|string $id): void
+	{
+		// find element with id and remove it
+		// or when number find pos in sub and remove it
+		if (is_int($id)) {
+			if (!isset($this->sub[$id])) {
+				return;
+			}
+			unset($this->sub[$id]);
+			return;
+		}
+		// only on first level
+		foreach ($this->sub as $pos => $el) {
+			if (
+				$el->getId() === $id
+			) {
+				unset($this->sub[$pos]);
+				return;
+			}
+		}
+	}
+
+	/**
+	 * remove all sub elements
+	 *
+	 * @return void
+	 */
+	public function resetSub(): void
+	{
+		$this->sub = [];
+	}
+
+	// CSS Elements
+
+	/**
+	 * get the current set css elements
+	 *
+	 * @return array<string> list of css element entries
+	 */
+	public function getCss(): array
+	{
+		return $this->css;
+	}
+
+	/**
+	 * add one or many new css elements
+	 * Note that we can chain: add/remove/reset
+	 *
+	 * @param  string ...$css one or more css strings to add
+	 * @return Element        Current element for chaining
+	 */
+	public function addCss(string ...$css): Element
+	{
+		// should do check for empty/invalid css
+		$_set_css = [];
+		foreach ($css as $_css) {
+			if (empty($_css)) {
+				Error::setError(
+					'204',
+					'cannot have empty css string',
+				);
+				// TODO: shoud throw error
+				continue;
+			}
+			// -?[_A-Za-z][_A-Za-z0-9-]*
+			if (!preg_match("/^-?[_A-Za-z][_A-Za-z0-9-]*$/", $_css)) {
+				Error::setWarning(
+					'205',
+					'possible invalid css string',
+					['css' => $_css, 'id' => $this->id, 'tag' => $this->tag]
+				);
+				// TODO: shoud throw error
+			}
+			$_set_css[] = $_css;
+		}
+		$this->css = array_unique(array_merge($this->css, $_set_css));
+		return $this;
+	}
+
+	/**
+	 * remove one or more css elements
+	 * Note that we can chain: add/remove/reset
+	 *
+	 * @param  string ...$css one or more css strings to remove
+	 * @return Element        Current element for chaining
+	 */
+	public function removeCss(string ...$css): Element
+	{
+		$this->css = array_diff($this->css, $css);
+		return $this;
+	}
+
+	/**
+	 * unset all css elements
+	 * Note that we can chain: add/remove/reset
+	 *
+	 * @return Element
+	 */
+	public function resetCss(): Element
+	{
+		$this->css = [];
+		return $this;
+	}
+
+	// build output from tree
+
+	/**
+	 * build html string from the current element tree (self)
+	 * or from the Element tree given as parameter
+	 * if $add_nl is set then new lines are added before each sub element added
+	 * no indet is done (tab or other)
+	 *
+	 * @param  Element|null $tree                   Different Element tree to build
+	 *                                              if not set (null), self is used
+	 * @param  bool         $add_nl [default=false] Optional output string line breaks
+	 * @return string                               HTML as string
+	 */
+	public function buildHtml(Element $tree = null, bool $add_nl = false): string
+	{
+		// print "D01: " . microtime(true) . "<br>";
+		if ($tree === null) {
+			$tree = $this;
+		}
+		$line = '<' . $tree->getTag();
+
+		if ($tree->getId()) {
+			$line .= ' id="' . $tree->getId() . '"';
+			if (in_array($tree->getTag(), Settings::NAME_ELEMENTS)) {
+				$line .= ' name="'
+					. (!empty($tree->getName()) ? $tree->getName() : $tree->getId())
+					. '"';
+			}
+		}
+		if (count($tree->getCss())) {
+			$line .= ' class="' . join(' ', $tree->getCss()) . '"';
+		}
+		foreach ($tree->getOptions() as $key => $item) {
+			// skip
+			if (in_array($key, Settings::SKIP_OPTIONS)) {
+				continue;
+			}
+			$line .= ' ' . $key . '="' . $item . '"';
+		}
+		$line .= '>';
+		if (strlen($tree->getContent()) > 0) {
+			$line .= $tree->getContent();
+		}
+		// sub nodes
+		foreach ($tree->getSub() as $sub) {
+			if ($add_nl === true) {
+				$line .= "\n";
+			}
+			$line .= $tree->buildHtml($sub, $add_nl);
+			if ($add_nl === true) {
+				$line .= "\n";
+			}
+		}
+
+		// close line if needed
+		if (!in_array($tree->getTag(), Settings::NO_CLOSE)) {
+			$line .= '</' . $tree->getTag() . '>';
+		}
+
+		return $line;
+	}
+
+	// this is static
+
+	/**
+	 * Builds a single string from an array of elements
+	 * a new line can be added before each new element if $add_nl is set to true
+	 *
+	 * @param  array<Element> $list                   array of Elements, uses buildHtml internal
+	 * @param  bool           $add_nl [default=false] Optional output string line breaks
+	 * @return string                                 HTML as string
+	 */
+	public static function buildHtmlFromList(array $list, bool $add_nl = false): string
+	{
+		$output = '';
+		foreach ($list as $el) {
+			if (!empty($output) && $add_nl === true) {
+				$output .= "\n";
+			}
+			$output .= $el->buildHtml();
+		}
+		return $output;
+	}
+
+	// so we can call builder statically
+
+	/**
+	 * Search element tree for id and add
+	 * if id is empty add at element given in parameter $base
+	 *
+	 * @param  Element $base   Element to attach to
+	 * @param  Element $attach Element to attach (single)
+	 * @param  string  $id     Optional id, if empty then attached at the end
+	 *                         If set will loop through ALL sub elements until
+	 *                         matching id found. if not found, not added
+	 * @return Element         Element with attached sub element
+	 */
+	public static function addElementWithId(
+		Element $base,
+		Element $attach,
+		string $id = ''
+	): Element {
+		// no id or matching id
+		if (
+			empty($id) ||
+			$base->getId() == $id
+		) {
+			$base->addSub($attach);
+			return $base;
+		}
+		// find id in 'id' in all 'sub'
+		foreach ($base->getSub() as $el) {
+			self::addElementWithId($el, $attach, $id);
+		}
+
+		return $base;
+	}
+
+	/**
+	 * add one or more elemens to $base
+	 *
+	 * @param  Element $base      Element to attach to
+	 * @param  Element ...$attach Element or Elements to attach
+	 * @return Element            Element with attached sub elements
+	 */
+	public static function addElement(
+		Element $base,
+		Element ...$attach
+	): Element {
+		// we must make sure we do not self attach
+		$base->addSub(...$attach);
+		return $base;
+	}
+
+	/**
+	 * Static call version for building
+	 * not recommended to be used, rather use "Element->buildHtml()"
+	 * wrapper for buildHtml
+	 *
+	 * @param  ?Element $tree                   Element tree to build
+	 *                                          if not set returns empty string
+	 * @param  bool     $add_nl [default=false] Optional output string line break
+	 * @return string                           build html as string
+	 * @deprecated Do not use, use Element->buildHtml() instead
+	 */
+	public static function printHtmlFromObject(Element $tree = null, bool $add_nl = false): string
+	{
+		// nothing ->bad
+		if ($tree === null) {
+			return '';
+		}
+		return $tree->buildHtml(add_nl: $add_nl);
+	}
+
+	/**
+	 * Undocumented function
+	 * wrapper for buildHtmlFromList
+	 *
+	 * @param  array<Element> $list                   array of Elements to build string from
+	 * @param  bool           $add_nl [default=false] Optional output string line break
+	 * @return string         build html as string
+	 */
+	public static function printHtmlFromArray(array $list, bool $add_nl = false): string
+	{
+		return self::buildHtmlFromList($list, $add_nl);
+	}
+}
+
+// __END__

www/lib/CoreLibs/Template/HtmlBuilder/General/Error.php

@@ -0,0 +1,127 @@
+<?php
+
+/**
+ * AUTOR: Clemens Schwaighofer
+ * CREATED: 2023/6/27
+ * DESCRIPTION:
+ * Error logging for the HtmlBuilder systs
+*/
+
+declare(strict_types=1);
+
+namespace CoreLibs\Template\HtmlBuilder\General;
+
+class Error
+{
+	/** @var array<array{level:string,id:string,message:string,context:array<mixed>}> */
+	private static array $messages = [];
+
+	/**
+	 * internal writer for messages
+	 *
+	 * @param  string $level
+	 * @param  string $id
+	 * @param  string $message
+	 * @param  array<mixed> $context
+	 * @return void
+	 */
+	private static function writeContent(
+		string $level,
+		string $id,
+		string $message,
+		array $context
+	): void {
+		self::$messages[] = [
+			'level' => $level,
+			'id' => $id,
+			'message' => $message,
+			'context' => $context,
+		];
+	}
+
+	/**
+	 * warning collector for all internal string errors
+	 * builds an warning with warning id, message text and array with optional content
+	 *
+	 * @param  string $id
+	 * @param  string $message
+	 * @param  array<mixed> $context
+	 * @return void
+	 */
+	public static function setWarning(string $id, string $message, array $context = []): void
+	{
+		self::writeContent('Warning', $id, $message, $context);
+	}
+
+	/**
+	 * error collector for all internal string errors
+	 * builds an error with error id, message text and array with optional content
+	 *
+	 * @param  string $id
+	 * @param  string $message
+	 * @param  array<mixed> $context
+	 * @return void
+	 */
+	public static function setError(string $id, string $message, array $context = []): void
+	{
+		self::writeContent('Error', $id, $message, $context);
+	}
+
+	/**
+	 * Return all set errors
+	 *
+	 * @return array<mixed>
+	 */
+	public static function getMessages(): array
+	{
+		return self::$messages;
+	}
+
+	/**
+	 * Reset all errors
+	 *
+	 * @return void
+	 */
+	public static function resetMessages(): void
+	{
+		self::$messages = [];
+	}
+
+	/**
+	 * internal level in message array exists check
+	 *
+	 * @param  string $level
+	 * @return bool
+	 */
+	private static function hasLevel(string $level): bool
+	{
+		return array_filter(
+			self::$messages,
+			function ($var) use ($level) {
+				return $var['level'] == $level ? true : false;
+			}
+		) === [] ? false : true;
+	}
+
+	/**
+	 * Check if any error is set
+	 *
+	 * @return bool
+	 */
+	public static function hasError(): bool
+	{
+		return self::hasLevel('Error');
+	}
+
+	/**
+	 * Check if any warning is set
+	 *
+	 * @return bool
+	 */
+	public static function hasWarning(): bool
+	{
+		return self::hasLevel('Warning');
+	}
+}
+
+// __END__

www/lib/CoreLibs/Template/HtmlBuilder/General/HtmlBuilderExcpetion.php

@@ -0,0 +1,21 @@
+<?php
+
+/**
+ * AUTOR: Clemens Schwaighofer
+ * CREATED: 2023/6/28
+ * DESCRIPTION:
+ * Exception class for the HtmlBuilder blocks
+*/
+
+declare(strict_types=1);
+
+namespace CoreLibs\Template\HtmlBuilder\General;
+
+/**
+ * Exception class for HtmlBuilder
+ */
+class HtmlBuilderExcpetion extends \Exception
+{
+}
+
+// __END__

www/lib/CoreLibs/Template/HtmlBuilder/General/Settings.php

@@ -0,0 +1,69 @@
+<?php
+
+/**
+ * AUTOR: Clemens Schwaighofer
+ * CREATED: 2023/7/22
+ * DESCRIPTION:
+ * General settings for html elements
+*/
+
+declare(strict_types=1);
+
+namespace CoreLibs\Template\HtmlBuilder\General;
+
+class Settings
+{
+	/** @var array<string> list of html elements that can have the name tag */
+	public const NAME_ELEMENTS = [
+		'button',
+		'fieldset',
+		'form',
+		'iframe',
+		'input',
+		'map',
+		'meta',
+		'object',
+		'output',
+		'param',
+		'select',
+		'textarea',
+	];
+
+	/** @var array<string> options key entries to be skipped in build */
+	public const SKIP_OPTIONS = [
+		'id',
+		'name',
+		'class',
+	];
+
+	/** @var array<string> html elements that don't need to be closed */
+	public const NO_CLOSE = [
+		'input',
+		'br',
+		'img',
+		'hr',
+		'area',
+		'col',
+		'keygen',
+		'wbr',
+		'track',
+		'source',
+		'param',
+		'command',
+		// only in header
+		'base',
+		'meta',
+		'link',
+		'embed',
+	];
+
+	/** @var array<string> invalid tags, not allowed in body */
+	public const NOT_IN_BODY_ALLOWED = [
+		'base',
+		'meta',
+		'link',
+		'embed', // not sure
+	];
+}
+
+// __END__

www/lib/CoreLibs/Template/HtmlBuilder/StringReplace.php

@@ -0,0 +1,194 @@
+<?php
+
+/**
+ * AUTOR: Clemens Schwaighofer
+ * CREATED: 2023/6/23
+ * DESCRIPTION:
+ * Simeple string replace calls for elements
+*/
+
+declare(strict_types=1);
+
+namespace CoreLibs\Template\HtmlBuilder;
+
+use CoreLibs\Template\HtmlBuilder\General\Error;
+use CoreLibs\Template\HtmlBuilder\General\HtmlBuilderExcpetion;
+
+class StringReplace
+{
+	/** @var array<string,string> */
+	private static array $elements = [];
+	/** @var array<string,string> */
+	private static array $replace = [];
+
+	/**
+	 * load html blocks into array for repeated usage
+	 * each array group parameter has 0: index, 1: content
+	 * There is no content check done.
+	 * index must be non empty (but has no fixed format)
+	 * if same index is tried twice it will set an error and skip
+	 *
+	 * @param  array{0:string,1:string} ...$element Elements to load
+	 * @return void
+	 * @throws HtmlBuilderExcpetion
+	 */
+	public static function loadElements(array ...$element): void
+	{
+		foreach ($element as $el) {
+			$index = $el[0] ?? '';
+			if (empty($index)) {
+				Error::setError(
+					'310',
+					'Index cannot be an empty string',
+					[
+						'element' => $index
+					]
+				);
+				throw new HtmlBuilderExcpetion('Index cannot be an empty string');
+			}
+			if (isset(self::$elements[$index])) {
+				Error::setError(
+					'311',
+					'Index already exists',
+					[
+						'element' => $index
+					]
+				);
+				throw new HtmlBuilderExcpetion('Index already exists: ' . $index);
+			}
+			// content check?
+			self::$elements[$index] = $el[1];
+		}
+	}
+
+	/**
+	 * update an element at index
+	 * can also be used to reset (empty string)
+	 *
+	 * @param  string $index
+	 * @param  string $element
+	 * @return void
+	 */
+	public static function updateElement(string $index, string $element): void
+	{
+		if (!isset(self::$elements[$index])) {
+			Error::setError(
+				'312',
+				'Index does not exists',
+				[
+					'element' => $index
+				]
+			);
+			throw new HtmlBuilderExcpetion('Index does not exists: ' . $index);
+		}
+		// allow empty reset
+		self::$elements[$index] = $element;
+	}
+
+	/**
+	 * get an element block at index
+	 * if not found will return false
+	 *
+	 * @param  string      $index
+	 * @return string
+	 * @throws HtmlBuilderExcpetion
+	 */
+	public static function getElement(string $index): string
+	{
+		if (!isset(self::$elements[$index])) {
+			Error::setError('321', 'Index not found in elements', ['element' => $index]);
+			throw new HtmlBuilderExcpetion('Index not found in elements array: ' . $index);
+		}
+		return self::$elements[$index];
+	}
+
+	/**
+	 * set a replacement block at index
+	 * can be used for setting one block and using it agai
+	 *
+	 * @param  string $index
+	 * @param  string $content
+	 * @return void
+	 */
+	public static function setReplaceBlock(string $index, string $content): void
+	{
+		self::$replace[$index] = $content;
+	}
+
+	/**
+	 * get replacement block at index, if not found return empty and set error
+	 *
+	 * @param  string $index
+	 * @return string
+	 * @throws HtmlBuilderExcpetion
+	 */
+	public static function getReplaceBlock(string $index): string
+	{
+		if (!isset(self::$replace[$index])) {
+			Error::setError('331', 'Index not found in replace block', ['replace' => $index]);
+			throw new HtmlBuilderExcpetion('Index not found in replace block array: ' . $index);
+		}
+		return self::$replace[$index];
+	}
+
+	/**
+	 * build and element on an index and either returns it or also sets it
+	 * into the replace block array
+	 * if index not found in relement list will return false
+	 *
+	 * @param  string        $index   index of set element
+	 * @param  array<string,string> $replace array of text to search (key) and replace (value) for
+	 * @return string
+	 * @throws HtmlBuilderExcpetion
+	 */
+	public static function buildElement(
+		string $index,
+		array $replace,
+		string $replace_index = ''
+	): string {
+		try {
+			self::getElement($index);
+		} catch (HtmlBuilderExcpetion $e) {
+			throw new HtmlBuilderExcpetion('Cannot fetch element with index: ' . $index, 0, $e);
+		}
+		if ($replace_index) {
+			self::setReplaceBlock(
+				$replace_index,
+				self::replaceData(self::$elements[$index], $replace)
+			);
+			return self::getReplaceBlock($replace_index);
+		} else {
+			return self::replaceData(self::$elements[$index], $replace);
+		}
+	}
+
+	/**
+	 * main replace entries in text string
+	 * elements to be replaced are in {} brackets. if they are missing in the
+	 * replace array they will be added.
+	 * if the replace and content count is not the same then an error will be thrown
+	 *
+	 * @param  string               $data
+	 * @param  array<string,string> $replace
+	 * @return string
+	 * @throws HtmlBuilderExcpetion
+	 */
+	public static function replaceData(string $data, array $replace): string
+	{
+		$to_replace = array_keys($replace);
+		// all replace data must have {} around
+		array_walk($to_replace, function (&$entry) {
+			if (!str_starts_with($entry, '{')) {
+				$entry = '{' . $entry;
+			}
+			if (!str_ends_with($entry, '}')) {
+				$entry .= '}';
+			}
+			// do some validation?
+		});
+		// replace content
+		return str_replace($to_replace, array_values($replace), $data);
+	}
+}
+
+// __END__

www/vendor/composer/autoload_classmap.php

@@ -77,6 +77,12 @@ return array(
     'CoreLibs\\Security\\CreateKey' => $baseDir . '/lib/CoreLibs/Security/CreateKey.php',
     'CoreLibs\\Security\\Password' => $baseDir . '/lib/CoreLibs/Security/Password.php',
     'CoreLibs\\Security\\SymmetricEncryption' => $baseDir . '/lib/CoreLibs/Security/SymmetricEncryption.php',
+    'CoreLibs\\Template\\HtmlBuilder\\Block' => $baseDir . '/lib/CoreLibs/Template/HtmlBuilder/Block.php',
+    'CoreLibs\\Template\\HtmlBuilder\\Element' => $baseDir . '/lib/CoreLibs/Template/HtmlBuilder/Element.php',
+    'CoreLibs\\Template\\HtmlBuilder\\General\\Error' => $baseDir . '/lib/CoreLibs/Template/HtmlBuilder/General/Error.php',
+    'CoreLibs\\Template\\HtmlBuilder\\General\\HtmlBuilderExcpetion' => $baseDir . '/lib/CoreLibs/Template/HtmlBuilder/General/HtmlBuilderExcpetion.php',
+    'CoreLibs\\Template\\HtmlBuilder\\General\\Settings' => $baseDir . '/lib/CoreLibs/Template/HtmlBuilder/General/Settings.php',
+    'CoreLibs\\Template\\HtmlBuilder\\StringReplace' => $baseDir . '/lib/CoreLibs/Template/HtmlBuilder/StringReplace.php',
     'CoreLibs\\Template\\SmartyExtend' => $baseDir . '/lib/CoreLibs/Template/SmartyExtend.php',
     'FileUpload\\Core\\qqUploadedFile' => $baseDir . '/lib/FileUpload/Core/qqUploadedFile.php',
     'FileUpload\\Core\\qqUploadedFileForm' => $baseDir . '/lib/FileUpload/Core/qqUploadedFileForm.php',

www/vendor/composer/autoload_static.php

@@ -128,6 +128,12 @@ class ComposerStaticInit10fe8fe2ec4017b8644d2b64bcf398b9
         'CoreLibs\\Security\\CreateKey' => __DIR__ . '/../..' . '/lib/CoreLibs/Security/CreateKey.php',
         'CoreLibs\\Security\\Password' => __DIR__ . '/../..' . '/lib/CoreLibs/Security/Password.php',
         'CoreLibs\\Security\\SymmetricEncryption' => __DIR__ . '/../..' . '/lib/CoreLibs/Security/SymmetricEncryption.php',
+        'CoreLibs\\Template\\HtmlBuilder\\Block' => __DIR__ . '/../..' . '/lib/CoreLibs/Template/HtmlBuilder/Block.php',
+        'CoreLibs\\Template\\HtmlBuilder\\Element' => __DIR__ . '/../..' . '/lib/CoreLibs/Template/HtmlBuilder/Element.php',
+        'CoreLibs\\Template\\HtmlBuilder\\General\\Error' => __DIR__ . '/../..' . '/lib/CoreLibs/Template/HtmlBuilder/General/Error.php',
+        'CoreLibs\\Template\\HtmlBuilder\\General\\HtmlBuilderExcpetion' => __DIR__ . '/../..' . '/lib/CoreLibs/Template/HtmlBuilder/General/HtmlBuilderExcpetion.php',
+        'CoreLibs\\Template\\HtmlBuilder\\General\\Settings' => __DIR__ . '/../..' . '/lib/CoreLibs/Template/HtmlBuilder/General/Settings.php',
+        'CoreLibs\\Template\\HtmlBuilder\\StringReplace' => __DIR__ . '/../..' . '/lib/CoreLibs/Template/HtmlBuilder/StringReplace.php',
         'CoreLibs\\Template\\SmartyExtend' => __DIR__ . '/../..' . '/lib/CoreLibs/Template/SmartyExtend.php',
         'FileUpload\\Core\\qqUploadedFile' => __DIR__ . '/../..' . '/lib/FileUpload/Core/qqUploadedFile.php',
         'FileUpload\\Core\\qqUploadedFileForm' => __DIR__ . '/../..' . '/lib/FileUpload/Core/qqUploadedFileForm.php',