3v4l.org

run code in 500+ PHP versions simultaneously
<?php $dom = new \DOMDocument(); $root = $dom->createElementNS('http://example.com', 'root'); $dom->appendChild($root); $a1 = $dom->createElementNS('http://example.com', 'a'); $a1->appendChild($dom->createElementNS('http://example.com', 'b')); $root->appendChild($a1); $a2 = $dom->createElementNS('http://example.com', 'a'); $a2->appendChild($dom->createElementNS('http://example.com', 'b')); $root->appendChild($a2); echo $dom->saveXML();
Output for 8.0.1 - 8.0.30, 8.1.0 - 8.1.34, 8.2.0 - 8.2.32, 8.3.0 - 8.3.32, 8.4.1 - 8.4.23, 8.5.0 - 8.5.8
<?xml version="1.0"?> <root xmlns="http://example.com"><a><b/></a><a><b/></a></root>

preferences:
90.19 ms | 1154 KiB | 4 Q