diff --git a/4dev/tests/Template/CoreLibsTemplateHtmlBuilderBlockTest.php b/4dev/tests/Template/CoreLibsTemplateHtmlBuilderBlockTest.php
index 65098a94..0350af92 100644
--- a/4dev/tests/Template/CoreLibsTemplateHtmlBuilderBlockTest.php
+++ b/4dev/tests/Template/CoreLibsTemplateHtmlBuilderBlockTest.php
@@ -22,6 +22,13 @@ final class CoreLibsTemplateHtmlBuilderBlockTest extends TestCase
 			Block::buildHtml($el)
 		);
 	}
+
+	// ael
+	// aelx|addSub
+	// resetSub
+	// acssel/rcssel/scssel
+	// buildHtml
+	// buildHtmlFromList|printHtmlFromArray
 }
 
 // __END__
diff --git a/4dev/tests/Template/CoreLibsTemplateHtmlBuilderElementTest.php b/4dev/tests/Template/CoreLibsTemplateHtmlBuilderElementTest.php
index 3f94d544..9321d0d0 100644
--- a/4dev/tests/Template/CoreLibsTemplateHtmlBuilderElementTest.php
+++ b/4dev/tests/Template/CoreLibsTemplateHtmlBuilderElementTest.php
@@ -7,6 +7,7 @@ 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
@@ -204,6 +205,8 @@ final class CoreLibsTemplateHtmlBuilderElementTest extends TestCase
 			'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>',
@@ -218,7 +221,7 @@ final class CoreLibsTemplateHtmlBuilderElementTest extends TestCase
 			[[
 				'level' => 'Error',
 				'id' => '100',
-				'message' => 'Cannot assign Element, this would create a loop',
+				'message' => 'Cannot assign Element to itself, this would create an infinite loop',
 				'context' => ['tag' => 'div', 'id' => 'sub-1']
 			]],
 			Error::getMessages(),
@@ -287,11 +290,11 @@ final class CoreLibsTemplateHtmlBuilderElementTest extends TestCase
 	/**
 	 * Undocumented function
 	 *
-	 * @testdox test change content
+	 * @testdox test change tag/id/content
 	 *
 	 * @return void
 	 */
-	public function testChangeContent(): void
+	public function testChangeElementData(): void
 	{
 		$el = new Element('div', 'id', 'Content');
 		// content change
@@ -306,6 +309,30 @@ final class CoreLibsTemplateHtmlBuilderElementTest extends TestCase
 			$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'
+		);
 	}
 
 	/**
@@ -349,7 +376,15 @@ final class CoreLibsTemplateHtmlBuilderElementTest extends TestCase
 
 	// build output
 	// build from array list
-	public function testBuildHtml(): void
+
+	/**
+	 * Undocumented function
+	 *
+	 * @testdox build element tree from object
+	 *
+	 * @return void
+	 */
+	public function testBuildHtmlObject(): void
 	{
 		// build a simple block
 		// div -> div -> button
@@ -399,13 +434,36 @@ final class CoreLibsTemplateHtmlBuilderElementTest extends TestCase
 	/**
 	 * Undocumented function
 	 *
-	 * @testdox check for invalid tag detection
+	 * @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(),
@@ -422,6 +480,27 @@ final class CoreLibsTemplateHtmlBuilderElementTest extends TestCase
 			'check error message failed'
 		);
 
+		// if we set invalid tag
+		$el = new Element('div');
+		$this->expectException(HtmlBuilderExcpetion::class);
+		$this->expectExceptionMessage("Invalid or empty tag");
+		$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');
diff --git a/4dev/tests/Template/CoreLibsTemplateHtmlBuilderStringReplaceTest.php b/4dev/tests/Template/CoreLibsTemplateHtmlBuilderStringReplaceTest.php
index 35406f1a..491d8892 100644
--- a/4dev/tests/Template/CoreLibsTemplateHtmlBuilderStringReplaceTest.php
+++ b/4dev/tests/Template/CoreLibsTemplateHtmlBuilderStringReplaceTest.php
@@ -39,15 +39,27 @@ HTML,
 			StringReplace::replaceData(
 				$html_block,
 				[
-					'ID', 'CSS', '{CONTENT}'
-				],
-				[
-					'block-id', join(',', ['blue', 'red']),
-					'Some content here<br>with bla bla inside'
+					'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__
diff --git a/www/admin/class_test.html_build.element.php b/www/admin/class_test.html_build.element.php
index 2ac022e6..a80669ca 100644
--- a/www/admin/class_test.html_build.element.php
+++ b/www/admin/class_test.html_build.element.php
@@ -20,6 +20,7 @@ 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([
@@ -83,7 +84,11 @@ echo "<hr>";
 // self loop
 
 $el_s = new Element('div', 'id-s', 'Self');
-$el_s->addSub($el_s, new Element('span', '', 'Span'));
+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>";
@@ -95,8 +100,12 @@ $el_s_2->addSub(
 );
 
 $el_s_3 = new Element('div', 'id-3', 'ID 3');
-$el_s_3->addSub($el_s_2);
-$el_s_2->addSub($el_s_2);
+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>";
 
@@ -104,12 +113,22 @@ print "el_s_3, buildHtml(): <pre>" . htmlentities($el_s_3->buildHtml()) . "</pre
 
 echo "<hr>";
 Error::resetMessages();
-$el_er = new Element('');
+try {
+	$el_er = new Element('');
+} catch (HtmlBuilderExcpetion $e) {
+	print "E: " . $e->getMessage() . " | " . $e->getTraceAsString() . "<br>";
+	print "E: " . $e->getPrevious()->getMessage() . " | " . $e->getPrevious()->getTraceAsString() . "<br>";
+}
 print "Errors: <pre>" . print_r(Error::getMessages(), true) . "</pre>";
 print "Warning: " . Support::printToString(Error::hasWarning()) . "<br>";
 print "Error: " . Support::printToString(Error::hasError()) . "<br>";
 Error::resetMessages();
-$el_er = new Element('123123');
+try {
+	$el_er = new Element('123123');
+} catch (HtmlBuilderExcpetion $e) {
+	print "E: " . $e->getMessage() . " | " . $e->getTraceAsString() . "<br>";
+	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>";
diff --git a/www/admin/class_test.html_build.replace.php b/www/admin/class_test.html_build.replace.php
index 948ce12c..99cca158 100644
--- a/www/admin/class_test.html_build.replace.php
+++ b/www/admin/class_test.html_build.replace.php
@@ -44,11 +44,9 @@ HTML;
 print "<pre>" . htmlentities(StringReplace::replaceData(
 	$html_block,
 	[
-		'ID', 'CSS', '{CONTENT}'
-	],
-	[
-		'block-id', join(',', ['blue', 'red']),
-		'Some content here<br>with bla bla inside'
+		'ID' => 'block-id',
+		'CSS' => join(',', ['blue', 'red']),
+		'{CONTENT}' => 'Some content here<br>with bla bla inside'
 	]
 )) . "</pre>";
 
@@ -63,14 +61,18 @@ print "Get: <pre>" . htmlentities(StringReplace::getElement('bar') ?: '') . '</p
 
 print "Build element: <pre>" . htmlentities(StringReplace::buildElement(
 	'bar',
-	['ID}', '{CONTENT'],
-	['new-id', 'Test cow 日本語']
+	[
+		'ID}' => 'new-id',
+		'{CONTENT' => 'Test cow 日本語'
+	]
 )) . '</pre>' ;
 
 print "Build element as replace: <pre>" . htmlentities(StringReplace::buildElement(
 	'bar',
-	['ID}', '{CONTENT'],
-	['diff-id', 'Test cow 日本語. More text plus'],
+	['
+		ID}' => 'diff-id',
+		'{CONTENT' => 'Test cow 日本語. More text plus'
+	],
 	'rpl-1'
 )) . '</pre>' ;
 
diff --git a/www/admin/class_test.php b/www/admin/class_test.php
index c9f52a56..c0f15b72 100644
--- a/www/admin/class_test.php
+++ b/www/admin/class_test.php
@@ -83,7 +83,7 @@ $test_files = [
 	'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: REPLACE',
+	'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',
diff --git a/www/lib/CoreLibs/Template/HtmlBuilder/Block.php b/www/lib/CoreLibs/Template/HtmlBuilder/Block.php
index c5ef77ea..434b0f4d 100644
--- a/www/lib/CoreLibs/Template/HtmlBuilder/Block.php
+++ b/www/lib/CoreLibs/Template/HtmlBuilder/Block.php
@@ -6,11 +6,15 @@
  * 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
 {
@@ -22,6 +26,7 @@ class Block
 	 * @param  string $content
 	 * @param  array<string> $css,
 	 * @param  array<string,string>  $options
+	 * @throws HtmlBuilderExcpetion
 	 */
 	public static function cel(
 		string $tag,
@@ -30,6 +35,14 @@ class Block
 		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,
diff --git a/www/lib/CoreLibs/Template/HtmlBuilder/Element.php b/www/lib/CoreLibs/Template/HtmlBuilder/Element.php
index 83ad739c..3169067f 100644
--- a/www/lib/CoreLibs/Template/HtmlBuilder/Element.php
+++ b/www/lib/CoreLibs/Template/HtmlBuilder/Element.php
@@ -14,6 +14,7 @@ namespace CoreLibs\Template\HtmlBuilder;
 
 use CoreLibs\Template\HtmlBuilder\General\Settings;
 use CoreLibs\Template\HtmlBuilder\General\Error;
+use CoreLibs\Template\HtmlBuilder\General\HtmlBuilderExcpetion;
 
 class Element
 {
@@ -46,6 +47,7 @@ class Element
 	 *                                       eg: onClick => 'something();'
 	 *                                       id, css are skipped
 	 *                                       name only set on input/button
+	 * @throws HtmlBuilderExcpetion
 	 */
 	public function __construct(
 		string $tag,
@@ -54,6 +56,28 @@ class Element
 		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(
@@ -61,9 +85,29 @@ class Element
 				'invalid or empty tag',
 				['tag' => $tag]
 			);
-			return;
+			throw new HtmlBuilderExcpetion('Invalid or empty 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:
@@ -77,63 +121,11 @@ class Element
 			Error::setWarning(
 				'202',
 				'possible invalid id',
-				['id' => $id, 'tag' => $this->tag]
+				['id' => $id, 'tag' => $this->getTag()]
 			);
+			// TODO: shoud throw error
 		}
 		$this->id = $id;
-		if (
-			!empty($options['name']) &&
-			!preg_match("/^[A-Za-z][\w-]*$/", $options['name'])
-		) {
-			Error::setWarning(
-				'203',
-				'possible invalid name',
-				['name' => $options['name'], 'id' => $this->id, 'tag' => $this->tag]
-			);
-		}
-		// same as id
-		$this->name = $options['name'] ?? '';
-		// anything allowed
-		$this->content = $content;
-		// should do check for empty/invalid css
-		foreach ($css as $_css) {
-			if (empty($_css)) {
-				Error::setError(
-					'204',
-					'cannot have empty css string',
-				);
-				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]
-				);
-			}
-			$this->css[] = $_css;
-		}
-		// some basic options check
-		foreach ($options as $key => $value) {
-			if (empty($key)) {
-				Error::setError(
-					'110',
-					'Cannot set option with empty key',
-					['id' => $this->id, 'tag' => $this->tag]
-				);
-				continue;
-			}
-			if ($value === null) {
-				Error::setError(
-					'210',
-					'Cannot set option with null value',
-					['id' => $this->id, 'tag' => $this->tag]
-				);
-				continue;
-			}
-			$this->options[$key] = $value;
-		}
 	}
 
 	/**
@@ -147,13 +139,26 @@ class Element
 	}
 
 	/**
-	 * get the tag name
+	 * Set name for elements
+	 * only for elements that need it (input/button/form)
 	 *
-	 * @return string HTML element tag
+	 * @param  string $name
+	 * @return void
 	 */
-	public function getTag(): string
+	public function setName(string $name): void
 	{
-		return $this->tag;
+		if (
+			!empty($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;
 	}
 
 	/**
@@ -202,11 +207,21 @@ class Element
 					'Cannot set option with empty key',
 					['id' => $this->getId(), 'tag' => $this->getTag()]
 				);
+				// TODO: shoud throw error
 				continue;
 			}
 			// if data is null
 			if ($value === null) {
-				unset($this->options[$key]);
+				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;
@@ -243,6 +258,7 @@ class Element
 	 *
 	 * @param  Element $sub One or many elements to add
 	 * @return void
+	 * @throws HtmlBuilderExcpetion
 	 */
 	public function addSub(Element ...$sub): void
 	{
@@ -252,10 +268,10 @@ class Element
 			if ($_sub == $this) {
 				Error::setError(
 					'100',
-					'Cannot assign Element, this would create a loop',
+					'Cannot assign Element to itself, this would create an infinite loop',
 					['id' => $this->getId(), 'tag' => $this->getTag()]
 				);
-				continue;
+				throw new HtmlBuilderExcpetion('Cannot assign Element to itself, this would create an infinite loop');
 			}
 			array_push($this->sub, $_sub);
 		}
@@ -319,7 +335,29 @@ class Element
 	 */
 	public function addCss(string ...$css): Element
 	{
-		$this->css = array_unique(array_merge($this->css, $css));
+		// 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;
 	}
 
diff --git a/www/lib/CoreLibs/Template/HtmlBuilder/General/HtmlBuilderExcpetion.php b/www/lib/CoreLibs/Template/HtmlBuilder/General/HtmlBuilderExcpetion.php
new file mode 100644
index 00000000..8fe8a3fc
--- /dev/null
+++ b/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__
diff --git a/www/lib/CoreLibs/Template/HtmlBuilder/StringReplace.php b/www/lib/CoreLibs/Template/HtmlBuilder/StringReplace.php
index d031d503..1376e454 100644
--- a/www/lib/CoreLibs/Template/HtmlBuilder/StringReplace.php
+++ b/www/lib/CoreLibs/Template/HtmlBuilder/StringReplace.php
@@ -12,12 +12,13 @@ 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,array<string,string>> */
+	/** @var array<string,string> */
 	private static array $replace = [];
 
 	/**
@@ -28,16 +29,14 @@ class StringReplace
 	 * if same index is tried twice it will set an error and skip
 	 *
 	 * @param  array<string,string> ...$element Elements to load
-	 * @return bool                             False if double index or other error
-	 *                                          True on ok
+	 * @return void
+	 * @throws HtmlBuilderExcpetion
 	 */
-	public static function loadElements(array ...$element): bool
+	public static function loadElements(array ...$element): void
 	{
-		$error = false;
 		foreach ($element as $el) {
 			$index = $el[0] ?? '';
 			if (empty($index)) {
-				$error = true;
 				Error::setError(
 					'310',
 					'Index cannot be an empty string',
@@ -45,9 +44,9 @@ class StringReplace
 						'element' => $index
 					]
 				);
+				throw new HtmlBuilderExcpetion('Index cannot be an empty string');
 			}
 			if (isset(self::$elements[$index])) {
-				$error = true;
 				Error::setError(
 					'311',
 					'Index already exists',
@@ -55,11 +54,11 @@ class StringReplace
 						'element' => $index
 					]
 				);
+				throw new HtmlBuilderExcpetion('Index already exists: ' . $index);
 			}
 			// content check?
 			self::$elements[$index] = $el[1];
 		}
-		return $error;
 	}
 
 	/**
@@ -80,7 +79,7 @@ class StringReplace
 					'element' => $index
 				]
 			);
-			return;
+			throw new HtmlBuilderExcpetion('Index does not exists: ' . $index);
 		}
 		// allow empty reset
 		self::$elements[$index] = $element;
@@ -91,13 +90,14 @@ class StringReplace
 	 * if not found will return false
 	 *
 	 * @param  string      $index
-	 * @return string|false
+	 * @return string
+	 * @throws HtmlBuilderExcpetion
 	 */
-	public static function getElement(string $index): string|bool
+	public static function getElement(string $index): string
 	{
 		if (!isset(self::$elements[$index])) {
 			Error::setError('321', 'Index not found in elements', ['element' => $index]);
-			return false;
+			throw new HtmlBuilderExcpetion('Index not found in elements array: ' . $index);
 		}
 		return self::$elements[$index];
 	}
@@ -120,12 +120,13 @@ class StringReplace
 	 *
 	 * @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]);
-			return '';
+			throw new HtmlBuilderExcpetion('Index not found in replace block array: ' . $index);
 		}
 		return self::$replace[$index];
 	}
@@ -136,14 +137,12 @@ class StringReplace
 	 * if index not found in relement list will return false
 	 *
 	 * @param  string        $index   index of set element
-	 * @param  array<string> $replace array of text to search for
-	 * @param  array<string> $content content data to be set for replace
+	 * @param  array<string,string> $replace array of text to search (key) and replace (value) for
 	 * @return string|false
 	 */
 	public static function buildElement(
 		string $index,
 		array $replace,
-		array $content,
 		string $replace_index = ''
 	): string|bool {
 		if (self::getElement($index) === false) {
@@ -152,11 +151,19 @@ class StringReplace
 		if ($replace_index) {
 			self::setReplaceBlock(
 				$replace_index,
-				self::replaceData(self::$elements[$index], $replace, $content)
+				self::replaceData(
+					self::$elements[$index],
+					array_keys($replace),
+					array_values($replace)
+				)
 			);
 			return self::getReplaceBlock($replace_index);
 		} else {
-			return self::replaceData(self::$elements[$index], $replace, $content);
+			return self::replaceData(
+				self::$elements[$index],
+				array_keys($replace),
+				array_values($replace)
+			);
 		}
 	}
 
@@ -166,17 +173,14 @@ class StringReplace
 	 * 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> $replace
-	 * @param  array<string> $content
-	 * @return string|bool
+	 * @param  string               $data
+	 * @param  array<string,string> $replace
+	 * @return string
+	 * @throws HtmlBuilderExcpetion
 	 */
-	public static function replaceData(string $data, array $replace, array $content): string|bool
+	public static function replaceData(string $data, array $replace): string
 	{
-		if (count($replace) != count($content)) {
-			Error::setError('340', 'Replace and content count differ');
-			return false;
-		}
+		$replace = array_keys($replace);
 		// all replace data must have {} around
 		array_walk($replace, function (&$entry) {
 			if (!str_starts_with($entry, '{')) {
@@ -185,9 +189,10 @@ class StringReplace
 			if (!str_ends_with($entry, '}')) {
 				$entry .= '}';
 			}
+			// do some validation?
 		});
 		// replace content
-		return str_replace($replace, $content, $data);
+		return str_replace($replace, array_values($replace), $data);
 	}
 }
 
diff --git a/www/vendor/composer/autoload_classmap.php b/www/vendor/composer/autoload_classmap.php
index 85028794..54d6059d 100644
--- a/www/vendor/composer/autoload_classmap.php
+++ b/www/vendor/composer/autoload_classmap.php
@@ -80,8 +80,9 @@ return array(
     '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\\Replace' => $baseDir . '/lib/CoreLibs/Template/HtmlBuilder/Replace.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',
diff --git a/www/vendor/composer/autoload_static.php b/www/vendor/composer/autoload_static.php
index bad33352..301c1914 100644
--- a/www/vendor/composer/autoload_static.php
+++ b/www/vendor/composer/autoload_static.php
@@ -131,8 +131,9 @@ class ComposerStaticInit10fe8fe2ec4017b8644d2b64bcf398b9
         '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\\Replace' => __DIR__ . '/../..' . '/lib/CoreLibs/Template/HtmlBuilder/Replace.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',