d35e498f36
I'm adding this method to cover use-cases where we need to extract classes from a block's HTML. [MAILPOET-5741]
51 lines
1.5 KiB
PHP
51 lines
1.5 KiB
PHP
<?php declare(strict_types = 1);
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namespace MailPoet\EmailEditor\Integrations\Utils;
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/**
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* This class should guarantee that our work with the DOMDocument is unified and safe.
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*/
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class DomDocumentHelper {
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private \DOMDocument $dom;
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public function __construct(
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string $htmlContent
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) {
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$this->loadHtml($htmlContent);
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}
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private function loadHtml(string $htmlContent): void {
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libxml_use_internal_errors(true);
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$this->dom = new \DOMDocument();
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if (!empty($htmlContent)) {
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// prefixing the content with the XML declaration to force the input encoding to UTF-8
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$this->dom->loadHTML('<?xml encoding="UTF-8">' . $htmlContent, LIBXML_HTML_NOIMPLIED | LIBXML_HTML_NODEFDTD);
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}
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libxml_clear_errors();
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}
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public function findElement(string $tagName): ?\DOMElement {
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$elements = $this->dom->getElementsByTagName($tagName);
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return $elements->item(0) ?: null;
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}
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public function getAttributeValue(\DOMElement $element, string $attribute): string {
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return $element->hasAttribute($attribute) ? $element->getAttribute($attribute) : '';
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}
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/**
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* Searches for the first appearance of the given tag name and returns the value of specified attribute.
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*/
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public function getAttributeValueByTagName(string $tagName, string $attribute): ?string {
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$element = $this->findElement($tagName);
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if (!$element) {
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return null;
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}
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return $this->getAttributeValue($element, $attribute);
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}
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public function getOuterHtml(\DOMElement $element): string {
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return (string)$this->dom->saveHTML($element);
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}
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}
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