3v4l.org

run code in 150+ php & hhvm versions
Bugs & Features
<?php $array = array( 'filters'=> array('where'=>array('yr'=>1994))); echo array_keys($array);
Output for 5.4.0 - 7.1.0
Notice: Array to string conversion in /in/KhrsC on line 3 Array
Output for 4.3.0 - 5.3.29
Array