3v4l.org

run code in 200+ php & hhvm versions
Bugs & Features
<?php $a = ['foo-test' => [1], '-' => [2], 'bar-test' => [3]]; uksort($a, function($x, $y) { if (!isset($a[$x])) { throw new Exception("$x"); } if (!isset($a[$y])) { throw new Exception("$y"); } return $x < $y; });
based on JucVZ
Output for 7.0.0 - 7.2.0
Fatal error: Uncaught Exception: foo-test in /in/NeXYi:6 Stack trace: #0 [internal function]: {closure}('foo-test', '-') #1 /in/NeXYi(14): uksort(Array, Object(Closure)) #2 {main} thrown in /in/NeXYi on line 6
Process exited with code 255.
Output for 5.4.11 - 5.6.28
Warning: uksort(): Array was modified by the user comparison function in /in/NeXYi on line 14 Fatal error: Uncaught exception 'Exception' with message '-' in /in/NeXYi:6 Stack trace: #0 [internal function]: {closure}('-', 'foo-test') #1 /in/NeXYi(14): uksort(Array, Object(Closure)) #2 {main} thrown in /in/NeXYi on line 6
Process exited with code 255.
Output for 5.3.21 - 5.3.29
Parse error: syntax error, unexpected '[' in /in/NeXYi on line 3
Process exited with code 255.