3v4l.org

run code in 300+ PHP versions simultaneously
<?php $array = array( 0 => array(1, 2, 3, 4), 1 => array(1, 3, 2, 4), 2 => array(1, 2, 4, 3), 3 => array(1, 2, 5, 6) ); $filter = array(); $result = array_filter($array, function($e) use (&$filter) { $sum = array_sum($e); $ret = isset($filter[$sum]); $filter[$sum] = true; return !$ret; }); var_dump($result);
Output for 5.3.0 - 5.3.29, 5.4.0 - 5.4.45, 5.5.0 - 5.5.38, 5.6.0 - 5.6.40, 7.0.0 - 7.0.33, 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 - 8.1.33, 8.2.0 - 8.2.29, 8.3.0 - 8.3.27, 8.4.1 - 8.4.14
array(2) { [0]=> array(4) { [0]=> int(1) [1]=> int(2) [2]=> int(3) [3]=> int(4) } [3]=> array(4) { [0]=> int(1) [1]=> int(2) [2]=> int(5) [3]=> int(6) } }
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/9H60L on line 11
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/9H60L on line 11
Process exited with code 255.
Output for 4.3.2 - 4.3.4
Parse error: parse error in /in/9H60L on line 11
Process exited with code 255.

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