3v4l.org

run code in 300+ PHP versions simultaneously
<?php $b = ""; for ($x = 0; $x < 256; ++$x) $b .= chr($x); $a = [ $b ]; var_dump(serialize($a)); var_dump(unserialize(serialize($a)));

preferences:
91.33 ms | 1564 KiB | 5 Q