3v4l.org

run code in 300+ PHP versions simultaneously
<?php foreach (["", null, [], "\0"] as $var) echo var_export($var) ." = ". json_encode($var)."\n";
Output for 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
'' = "" NULL = null array ( ) = [] '' . "\0" . '' = "\u0000"
preferences:
110.88 ms | 1491 KiB | 4 Q