3v4l.org

run code in 300+ PHP versions simultaneously
<?php x = array('a'=>1, 'b'=>2); z = array_filter(x, function(&$val){ return $val%2; }); var_dump(x,z);
Output for 5.3.0 - 5.3.28, 5.4.0 - 5.4.30
Parse error: syntax error, unexpected '=' in /in/2OOci on line 2
Process exited with code 255.
preferences:
193.41 ms | 1395 KiB | 67 Q