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run code in 150+ php & hhvm versions
Bugs & Features
<?php $arr = [ ['p' => 10], ['p' => 20] ]; usort($arr, function($a,$b){ return $a['p']<$b['p']; }); var_dump($arr);
Output for 5.4.0 - 7.1.0
array(2) { [0]=> array(1) { ["p"]=> int(20) } [1]=> array(1) { ["p"]=> int(10) } }
Output for 4.4.2 - 4.4.9, 5.1.0 - 5.3.29
Parse error: syntax error, unexpected '[' in /in/lL6Aj on line 3
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 '[' in /in/lL6Aj on line 3
Process exited with code 255.
Output for 4.3.2 - 4.3.4
Parse error: parse error in /in/lL6Aj on line 3
Process exited with code 255.