3v4l.org

run code in 300+ PHP versions simultaneously
<?php $array = array( '13-2014' => 'z', '14-2014' => 'b', '6-2014' => 'a', '5-2014' => 'x' ); uksort($array, function($a, $b) { return str_replace('-','',$a) > str_replace('-','',$b); }); //print_r($array);

preferences:
38.12 ms | 402 KiB | 5 Q