3v4l.org

run code in 500+ PHP versions simultaneously
<?php $v1_d1 = 10; $v1_w2 = 20; $v1_d2 = 30; $v1_w3 = 40; $set = ['v1_d1', 'v1_w2', 'v1_d2', 'v1_w3']; foreach(compact(...$set) as $var) { echo $var; }

preferences:
103.19 ms | 1429 KiB | 5 Q