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<?php $html = '<div id="one-id" class="someClassName">Some text <a href="#" title="Words" id="linkId" class="classLink">link</a> with only the class and id attrtibutes.</div>'; $dom = new DOMDocument(); $dom->loadHTML($html, LIBXML_HTML_NOIMPLIED | LIBXML_HTML_NODEFDTD); $xpath = new DOMXPath($dom); foreach ($xpath->query('//*') as $node) { for ($i = $node->attributes->length - 1; $i >= 0; --$i) { $attr = $node->attributes->item($i); if (!in_array($attr->name, ['id', 'class'])) { $node->removeAttribute($attr->name); } } } echo $dom->saveHTML();
Output for 8.0.1 - 8.0.30, 8.1.0 - 8.1.33, 8.2.0 - 8.2.29, 8.3.0 - 8.3.28, 8.4.1 - 8.4.14, 8.5.0
<div id="one-id" class="someClassName">Some text <a id="linkId" class="classLink">link</a> with only the class and id attrtibutes.</div>
Output for 8.4.15
/bin/php-8.4.15: /usr/lib/libm.so.6: version `GLIBC_2.38' not found (required by /bin/php-8.4.15) /bin/php-8.4.15: /usr/lib/libm.so.6: version `GLIBC_2.35' not found (required by /bin/php-8.4.15) /bin/php-8.4.15: /usr/lib/libc.so.6: version `GLIBC_2.34' not found (required by /bin/php-8.4.15) /bin/php-8.4.15: /usr/lib/libc.so.6: version `GLIBC_2.38' not found (required by /bin/php-8.4.15)
Process exited with code 1.

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