3v4l.org

run code in 300+ PHP versions simultaneously
<?php $a = array(0=>'a',1=>'b',2=>'c',3=>'d'); while(list($k, $v) = each($a)){ echo $k.'-'.$v; } shuffle_assoc($a); print_r($a); ?>

preferences:
46.1 ms | 402 KiB | 5 Q