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<?php $a = [0, 1, 2, 3, 4, 5, 6]; $b = [4]; print_r(array_udiff($a, $b, function($x, $y) { return $x <=> $y; })); print_r(array_udiff($a, $b, function($x, $y) { return $x != $y; }));
Output for 8.2.0 - 8.2.18, 8.3.0 - 8.3.6
Array ( [0] => 0 [1] => 1 [2] => 2 [3] => 3 [5] => 5 [6] => 6 ) Deprecated: array_udiff(): Returning bool from comparison function is deprecated, return an integer less than, equal to, or greater than zero in /in/Jf78A on line 10 Array ( [0] => 0 [1] => 1 [2] => 2 [3] => 3 [4] => 4 [5] => 5 [6] => 6 )
Output for 8.0.0 - 8.0.30, 8.1.0 - 8.1.28
Array ( [0] => 0 [1] => 1 [2] => 2 [3] => 3 [5] => 5 [6] => 6 ) Deprecated: array_udiff(): Returning bool from comparison function is deprecated, return an integer less than, equal to, or greater than zero in /in/Jf78A on line 12 Array ( [0] => 0 [1] => 1 [2] => 2 [3] => 3 [4] => 4 [5] => 5 [6] => 6 )
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
Array ( [0] => 0 [1] => 1 [2] => 2 [3] => 3 [5] => 5 [6] => 6 ) Array ( [0] => 0 [1] => 1 [2] => 2 [3] => 3 [4] => 4 [5] => 5 [6] => 6 )
Output for 5.5.0 - 5.5.38, 5.6.0 - 5.6.40
Parse error: syntax error, unexpected '>' in /in/Jf78A on line 7
Process exited with code 255.

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