3v4l.org

run code in 150+ php & hhvm versions
Bugs & Features
<?php $arr = [1,NULL,2,3]; var_dump(array_diff_key($arr, array_filter($arr, 'is_null'));
Output for 5.4.0 - 5.4.22
Parse error: syntax error, unexpected ';' in /in/vsVsL on line 3
Process exited with code 255.
Output for 5.3.0 - 5.3.27
Parse error: syntax error, unexpected '[' in /in/vsVsL on line 2
Process exited with code 255.