3v4l.org

run code in 300+ PHP versions simultaneously
<?php $list = array( 0 => "F", 1 => "E", 60 => "B", 20 => "C", 14 => "D", 100 => "A" ); krsort($list); print 'sorted: '.var_export($list, true);

preferences:
26.24 ms | 402 KiB | 5 Q