public static Html::escapeCdataElement(\DOMNode $node, $comment_start = '//', $comment_end = '')
Adds comments around a <!CDATA section in a \DOMNode.
\DOMDocument::loadHTML() in \Drupal\Component\Utility\Html::load() makes CDATA sections from the contents of inline script and style tags. This can cause HTML4 browsers to throw exceptions.
This function attempts to solve the problem by creating a \DOMDocumentFragment to comment the CDATA tag.
Parameters
\DOMNode $node: The element potentially containing a CDATA node.
string $comment_start: (optional) A string to use as a comment start marker to escape the CDATA declaration. Defaults to '//'.
string $comment_end: (optional) A string to use as a comment end marker to escape the CDATA declaration. Defaults to an empty string.
File
- core/lib/Drupal/Component/Utility/Html.php, line 342
Class
- Html
- Provides DOMDocument helpers for parsing and serializing HTML strings.
Namespace
Drupal\Component\Utility
Code
public static function escapeCdataElement(\DOMNode $node, $comment_start = '//', $comment_end = '') { foreach ($node->childNodes as $child_node) { if ($child_node instanceof \DOMCdataSection) { $embed_prefix = "\n<!--{$comment_start}--><![CDATA[{$comment_start} ><!--{$comment_end}\n"; $embed_suffix = "\n{$comment_start}--><!]]>{$comment_end}\n"; // Prevent invalid cdata escaping as this would throw a DOM error. // This is the same behavior as found in libxml2. // Related W3C standard: http://www.w3.org/TR/REC-xml/#dt-cdsection // Fix explanation: http://wikipedia.org/wiki/CDATA#Nesting $data = str_replace(']]>', ']]]]><![CDATA[>', $child_node->data); $fragment = $node->ownerDocument->createDocumentFragment(); $fragment->appendXML($embed_prefix . $data . $embed_suffix); $node->appendChild($fragment); $node->removeChild($child_node); } } }
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