3v4l.org

run code in 300+ PHP versions simultaneously
<?php $consts = get_defined_constants(); $consts = array_keys($consts); usort($consts, function($a, $b) { return strlen($b) <=> strlen($a); }); foreach($consts as $const){ echo strlen($const).": ".$const."\n"; }

preferences:
46.65 ms | 402 KiB | 5 Q