3v4l.org

run code in 150+ php & hhvm versions
Bugs & Features
v<?php $items = array(array(1 => 1), array(2 => 2), array(1 => 1)); $items = array_filter($items, function($item) {static $seen; $serial = serialize($item); $retVal = !isset($seen[$serial]); $seen[$serial] = TRUE; return $retVal;}); var_dump($items);
Output for 5.3.0 - 5.6.28, hhvm-3.10.0 - 3.12.0, 7.0.0 - 7.1.0
varray(2) { [0]=> array(1) { [1]=> int(1) } [1]=> array(1) { [2]=> int(2) } }
Output for 4.4.2 - 4.4.9, 5.1.0 - 5.2.17
Parse error: syntax error, unexpected T_FUNCTION in /in/cAoV9 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 T_FUNCTION in /in/cAoV9 on line 3
Process exited with code 255.
Output for 4.3.2 - 4.3.4
Parse error: parse error in /in/cAoV9 on line 3
Process exited with code 255.