This method can be used to remove a namespace declaration from an element, even though the declaration is not considered an attribute by the DOM. The prefix will be removed from any element or attribute using it.<?php$dom = DOMDocument::loadXML('<foo:root xmlns:foo="http:bar"/>');$element = $dom->childNodes->item(0);// prints '0':echo (int) $element->hasAttributeNS('http:bar', 'foo');$element->removeAttributeNS('http:bar', 'foo');/* prints '<?xml version="1.0"?> <root/>': */print htmlentities($dom->saveXML());?>