3v4l.org

run code in 200+ php & hhvm versions
Bugs & Features
<?php $obj = new ArrayObject(['adrian' => 'test', 'ryan' => 'test']); var_dump(array_keys($obj));
Output for 5.4.0 - 7.2.0
Warning: array_keys() expects parameter 1 to be array, object given in /in/AFcrI on line 4 NULL
Output for 4.4.2 - 4.4.9, 5.1.0 - 5.3.29
Parse error: syntax error, unexpected '[', expecting ')' in /in/AFcrI on line 3
Process exited with code 255.
Output for 4.3.0 - 4.3.1, 4.3.5 - 4.4.1, 5.0.0 - 5.0.5
Parse error: parse error, unexpected '[', expecting ')' in /in/AFcrI on line 3
Process exited with code 255.
Output for 4.3.2 - 4.3.4
Parse error: parse error, expecting `')'' in /in/AFcrI on line 3
Process exited with code 255.