3v4l.org

run code in 300+ PHP versions simultaneously
<?php $doc = new DOMDocument(); $doc->appendChild($doc->createElement('container')); $doc->documentElement->setAttributeNode($doc->createAttributeNS('http://php.net/ns1', 'hello')); echo $doc->saveXML();
Output for 8.3.0 - 8.3.26, 8.4.1 - 8.4.13
<?xml version="1.0"?> <container xmlns:default="http://php.net/ns1" default:hello=""/>
Output for 5.0.0, 5.1.0, 8.0.1 - 8.0.30, 8.1.0 - 8.1.33, 8.2.0 - 8.2.29
<?xml version="1.0"?> <container xmlns="http://php.net/ns1" hello=""/>
preferences:
88.64 ms | 407 KiB | 5 Q