Dom\Attr::isId
PHP function
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(PHP 8 >= 8.4.0)
Description
Dom\Attr::isId(): bool
According to the DOM standard this requires a DTD which defines the attribute ID to be of type ID. To utilise this method the document must be validated at parse time by passing LIBXML_DTDVALID as an option.
Parameters Parameters
Examples
Dom\Attr::isId() Example
php
<?php
// We need to validate our document before referring to the id
$doc = Dom\XMLDocument::createFromFile('examples/book-docbook.xml', LIBXML_DTDVALID);
// We retrieve the attribute named id of the chapter element
$attr = $doc->getElementsByTagName('chapter')->item(0)->getAttributeNode('id');
var_dump($attr->isId()); // bool(true)
?>