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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));
based on 9965o
Output for 5.2.0 - 7.1.0
string(7) "urn:foo"
Output for 5.0.0 - 5.1.6
NULL
Output for 4.3.2 - 4.4.9
Fatal error: Cannot instantiate non-existent class: domdocument in /in/5fTJZ 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/5fTJZ on line 3