3v4l.org

run code in 150+ php & hhvm versions
Bugs & Features
<?php $dom = new DOMDocument(); $dom->loadXml('<foo xmlns="urn:foo"/>'); var_dump($dom->documentElement->lookupNamespaceUri(NULL)); var_dump($dom->documentElement->lookupNamespaceUri('' || NULL));
based on GZRct
Output for 5.2.0 - 5.6.28, 7.0.0 - 7.1.0
string(7) "urn:foo" NULL
Output for hhvm-3.10.0 - 3.12.0
string(7) "urn:foo" Warning: DOMNode::lookupNamespaceUri() expects parameter 1 to be string, boolean given in /in/vaFEf on line 7 NULL
Output for 5.0.0 - 5.1.6
NULL NULL
Output for 4.3.2 - 4.4.9
Fatal error: Cannot instantiate non-existent class: domdocument in /in/vaFEf on line 3
Process exited with code 255.
Output for 4.3.0 - 4.3.1
Fatal error: Cannot instantiate non-existent class: domdocument in /in/vaFEf on line 3