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<?php $items = array("abc", "cde", "xyz"); $udiff = array_udiff($items, $items, function ($a, $b) { $result = $a === $b; print("Comparing $a to $b, result is $result\n"); return $result; }); var_dump($udiff);
Output for 8.2.0 - 8.2.17, 8.3.0 - 8.3.4
Comparing abc to cde, result is Deprecated: array_udiff(): Returning bool from comparison function is deprecated, return an integer less than, equal to, or greater than zero in /in/UvIdl on line 6 Comparing cde to abc, result is Comparing cde to xyz, result is Comparing xyz to cde, result is Comparing abc to cde, result is Comparing cde to abc, result is Comparing cde to xyz, result is Comparing xyz to cde, result is Comparing abc to abc, result is 1 Comparing abc to cde, result is Comparing cde to abc, result is Comparing abc to cde, result is Comparing cde to abc, result is Comparing cde to xyz, result is Comparing xyz to cde, result is array(0) { }
Output for 8.0.0 - 8.0.30, 8.1.0 - 8.1.27
Comparing abc to cde, result is Deprecated: array_udiff(): Returning bool from comparison function is deprecated, return an integer less than, equal to, or greater than zero in /in/UvIdl on line 10 Comparing cde to abc, result is Comparing cde to xyz, result is Comparing xyz to cde, result is Comparing abc to cde, result is Comparing cde to abc, result is Comparing cde to xyz, result is Comparing xyz to cde, result is Comparing abc to abc, result is 1 Comparing abc to cde, result is Comparing cde to abc, result is Comparing abc to cde, result is Comparing cde to abc, result is Comparing cde to xyz, result is Comparing xyz to cde, result is array(0) { }
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
Comparing abc to cde, result is Comparing cde to xyz, result is Comparing abc to cde, result is Comparing cde to xyz, result is Comparing abc to abc, result is 1 Comparing abc to cde, result is Comparing abc to cde, result is Comparing cde to xyz, result is array(0) { }
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
Comparing cde to abc, result is Comparing xyz to cde, result is Comparing cde to abc, result is Comparing xyz to cde, result is Comparing xyz to xyz, result is 1 Comparing xyz to cde, result is Comparing xyz to cde, result is Comparing cde to abc, result is array(0) { }
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/UvIdl on line 6
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/UvIdl on line 6
Process exited with code 255.
Output for 4.3.2 - 4.3.4
Parse error: parse error in /in/UvIdl on line 6
Process exited with code 255.

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