<?php class HTMLPurifier_AttrTransform_HTML5_Dialog extends HTMLPurifier_AttrTransform { /** * @param array $attr * @param HTMLPurifier_Config $config * @param HTMLPurifier_Context $context * @return array */ public function transform($attr, $config, $context) { // The tabindex attribute must not be specified on dialog elements. // https://html.spec.whatwg.org/dev/interactive-elements.html#the-dialog-element unset($attr['tabindex']); return $attr; } }