3v4l.org

run code in 300+ PHP versions simultaneously
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 - 5.3.29, 5.4.0 - 5.4.45, 5.5.24 - 5.5.35, 5.6.8 - 5.6.28, 7.0.0 - 7.0.20, 7.1.0 - 7.1.33, 7.2.0 - 7.2.33, 7.3.0 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.6
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 - 5.1.6, 5.2.0 - 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 - 4.3.11, 4.4.0 - 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.

preferences:
176 ms | 401 KiB | 340 Q