3v4l.org

run code in 300+ PHP versions simultaneously
<?php $a = [ "\0\1" ]; var_dump(json_encode($a)); var_dump(json_decode(json_encode($a)));
Output for 7.1.0 - 7.1.33, 7.2.0 - 7.2.33, 7.3.0 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.34, 8.2.0 - 8.2.30, 8.3.0 - 8.3.30, 8.4.1 - 8.4.18, 8.5.0 - 8.5.3
string(16) "["\u0000\u0001"]" array(1) { [0]=> string(2) "" }
preferences:
42.58 ms | 1620 KiB | 4 Q