3v4l.org

run code in 300+ PHP versions simultaneously
<?php $name1 = 'Bob'; ['name'=> $name2] = ['name'=>$name1]; var_dump($name2);
Output for 8.1.0 - 8.1.28, 8.2.0 - 8.2.19, 8.3.0 - 8.3.7
string(3) "Bob"

preferences:
59.36 ms | 402 KiB | 62 Q