3v4l.org

run code in 150+ php & hhvm versions
Bugs & Features
<?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);
based on n8os0
Output for 7.0.0 - 7.1.0
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 hhvm-3.10.0 - 3.12.0
Comparing 20 to 10, result is Comparing 30 to 20, result is Comparing 10 to 20, result is Comparing 20 to 20, result is 1 Comparing 20 to 10, result is Comparing 30 to 20, result is array(0) { }
Output for 5.3.0 - 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 - 5.2.17
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 - 4.4.1, 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.