75 lines
2.3 KiB
PHP
75 lines
2.3 KiB
PHP
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<?php
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namespace JohannSchopplich;
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use DOMDocument;
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use DOMNode;
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class HTML5DOMDocument extends DOMDocument
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{
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/**
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* Name of temporary root element for the XML parser
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*/
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protected string $tempRoot = 'main';
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/**
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* Create a new HTML5-compatible document parser
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*/
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public function __construct(string $version = '1.0', string $encoding = 'UTF-8')
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{
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// Silence libxml errors with HTML5 elements
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libxml_use_internal_errors(true);
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// Call parent class
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parent::__construct($version, $encoding);
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}
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/**
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* Load HTML from string, make UTF-8 compatible and add temporary root element
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*/
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public function loadHTML(string $source, int $options = LIBXML_HTML_NOIMPLIED | LIBXML_HTML_NODEFDTD): bool
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{
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// `loadHTML` will treat the string as being in ISO-8859-1 unless
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// told otherwise, so translate anything above the ASCII range into
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// its html entity equivalent
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// @see https://stackoverflow.com/questions/39148170/utf-8-with-php-domdocument-loadhtml
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$convertedSource = htmlspecialchars_decode(htmlentities($source, ENT_COMPAT, 'UTF-8'), ENT_QUOTES);
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// Add fake root element for XML parser because it assumes that the
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// first encountered tag is the root element
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// @see https://stackoverflow.com/questions/39479994/php-domdocument-savehtml-breaks-format
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return parent::loadHTML("<{$this->tempRoot}>" . $convertedSource . "</{$this->tempRoot}>", $options);
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}
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/**
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* Strip the temporarily added root element
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*/
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private function unwrapTempRoot(string $output): string
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{
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if ($this->firstChild->nodeName === $this->tempRoot) {
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return substr($output, strlen($this->tempRoot) + 2, -strlen($this->tempRoot) - 4);
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}
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return $output;
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}
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/**
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* Dump the internal document into a HTML string
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*/
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#[\ReturnTypeWillChange]
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public function saveHTML(DOMNode|null $node = null, bool $entities = false): string|false
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{
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$html = parent::saveHTML($node);
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if ($entities === false) {
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$html = html_entity_decode($html);
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}
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if ($node === null) {
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$html = $this->unwrapTempRoot($html);
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}
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return $html;
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}
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}
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