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<?php $compare = function($a, $b) use(&$iteration_count) { // echo("$a : $b\n"); $iteration_count++; return strcmp($a, $b); }; $a = array('11', '21', '31', '41', '11'); $b = array('12', '22', '32', '42', '52', '11'); $iteration_count = 0; var_dump(array_udiff($a, $b, $compare)); var_dump($iteration_count); echo "\n\n"; $iteration_count = 0; $a_new = array_combine($a, array_fill(0, count($a), 1)); $b_new = array_combine($b, array_fill(0, count($b), 1)); var_dump(array_diff_uassoc($a_new, $b_new, $compare)); var_dump($iteration_count); echo "\n\n";
Output for 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 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.6
array(3) { [1]=> string(2) "21" [2]=> string(2) "31" [3]=> string(2) "41" } int(27) array(3) { [21]=> int(1) [31]=> int(1) [41]=> int(1) } int(31)
Output for 5.3.4 - 5.3.29, 5.4.0 - 5.4.45, 5.5.0 - 5.5.38, 5.6.0 - 5.6.40
array(3) { [1]=> string(2) "21" [2]=> string(2) "31" [3]=> string(2) "41" } int(27) array(3) { [21]=> int(1) [31]=> int(1) [41]=> int(1) } int(33)
Output for 5.3.0 - 5.3.3
array(3) { [1]=> string(2) "21" [2]=> string(2) "31" [3]=> string(2) "41" } int(30) array(3) { [21]=> int(1) [31]=> int(1) [41]=> int(1) } int(33)
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/lFQUm 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/lFQUm on line 3
Process exited with code 255.
Output for 4.3.2 - 4.3.4
Parse error: parse error in /in/lFQUm on line 3
Process exited with code 255.

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