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<?php $items = array(10, 20, 30); $udiff = array_udiff($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 - 8.2.18, 8.3.0 - 8.3.6
Comparing 10 to 20, 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/YTUVv on line 6 Comparing 20 to 10, result is Comparing 20 to 30, result is Comparing 30 to 20, result is Comparing 10 to 20, result is Comparing 20 to 10, result is Comparing 20 to 30, result is Comparing 30 to 20, result is Comparing 10 to 10, result is 1 Comparing 10 to 20, result is Comparing 20 to 10, result is Comparing 10 to 20, result is Comparing 20 to 10, result is Comparing 20 to 30, result is Comparing 30 to 20, result is array(0) { }
Output for 8.0.0 - 8.0.30, 8.1.0 - 8.1.28
Comparing 10 to 20, 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/YTUVv on line 10 Comparing 20 to 10, result is Comparing 20 to 30, result is Comparing 30 to 20, result is Comparing 10 to 20, result is Comparing 20 to 10, result is Comparing 20 to 30, result is Comparing 30 to 20, result is Comparing 10 to 10, result is 1 Comparing 10 to 20, result is Comparing 20 to 10, result is Comparing 10 to 20, result is Comparing 20 to 10, result is Comparing 20 to 30, result is Comparing 30 to 20, result is array(0) { }
Output for 7.0.0 - 7.0.20, 7.1.0 - 7.1.20, 7.2.6 - 7.2.33, 7.3.16 - 7.3.33, 7.4.0 - 7.4.33
Comparing 10 to 20, result is Comparing 20 to 30, result is Comparing 10 to 20, result is Comparing 20 to 30, result is Comparing 10 to 10, result is 1 Comparing 10 to 20, result is Comparing 10 to 20, result is Comparing 20 to 30, result is array(0) { }
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
Comparing 20 to 10, result is Comparing 30 to 20, result is Comparing 20 to 10, result is Comparing 30 to 20, result is Comparing 30 to 30, result is 1 Comparing 30 to 20, result is Comparing 30 to 20, result is Comparing 20 to 10, 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/YTUVv 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/YTUVv on line 6
Process exited with code 255.
Output for 4.3.2 - 4.3.4
Parse error: parse error in /in/YTUVv on line 6
Process exited with code 255.
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235.14 ms | 401 KiB | 311 Q