3v4l.org

run code in 150+ php & hhvm versions
Bugs & Features
<?php $array = array( 'filters'=> array('where'=>array('yr'=>1994))); echo array_shift(&array_keys($array['filters']['where']));
based on uBHQm
Output for 5.0.0 - 5.4.32
Fatal error: Can't use function return value in write context in /in/sM2RK on line 3
Process exited with code 255.
Output for 4.4.2 - 4.4.9
Parse error: syntax error, unexpected T_STRING, expecting T_VARIABLE or '$' in /in/sM2RK on line 3
Process exited with code 255.
Output for 4.3.0 - 4.3.1, 4.3.5 - 4.4.1
Parse error: parse error, unexpected T_STRING, expecting T_VARIABLE or '$' in /in/sM2RK on line 3
Process exited with code 255.
Output for 4.3.2 - 4.3.4
Parse error: parse error, expecting `T_VARIABLE' or `'$'' in /in/sM2RK on line 3
Process exited with code 255.