3v4l.org

run code in 200+ php & hhvm versions
Bugs & Features
<?php $a = ['foo-test' => [1], '-' => [2], 'bar-test' => [3]]; uksort($a, function($x, $y) use (&$a) { echo $x, PHP_EOL; // var_dump($a); if (!isset($a[$x])) { throw new Exception("Key '{$x}' not found."); } if (!isset($a[$y])) { throw new Exception("Key '{$y}' not found."); } return $x < $y; });
based on ZKA13
Output for 7.0.6 - 7.2.0
foo-test - foo-test
Output for 7.0.0 - 7.0.5
foo-test - foo-test Fatal error: Uncaught Exception: Key 'bar-test' not found. in /in/7DGl2:12 Stack trace: #0 [internal function]: {closure}('foo-test', 'bar-test') #1 /in/7DGl2(16): uksort(Array, Object(Closure)) #2 {main} thrown in /in/7DGl2 on line 12
Process exited with code 255.
Output for 5.4.11 - 5.6.28
- bar-test foo-test Warning: uksort(): Array was modified by the user comparison function in /in/7DGl2 on line 16
Output for 5.3.21 - 5.3.29
Parse error: syntax error, unexpected '[' in /in/7DGl2 on line 3
Process exited with code 255.