3v4l.org

run code in 300+ PHP versions simultaneously
<?php $x = simplexml_load_string('<foo><bar>1</bar></foo>'); $y = clone $x; unset($y->bar); echo $x->asXML(); echo $y->asXML();
Output for 8.0.0 - 8.0.30, 8.1.0 - 8.1.27, 8.2.0 - 8.2.17, 8.3.0 - 8.3.4
<?xml version="1.0"?> <foo><bar>1</bar></foo> <?xml version="1.0"?> <foo/>
Output for 5.5.24 - 5.5.35, 5.6.8 - 5.6.28, 7.0.0 - 7.0.20, 7.1.0 - 7.1.10, 7.2.0 - 7.2.33, 7.3.16 - 7.3.33, 7.4.0 - 7.4.33
<?xml version="1.0"?> <foo><bar>1</bar></foo> <foo/>

preferences:
182.42 ms | 403 KiB | 176 Q