3v4l.org

run code in 300+ PHP versions simultaneously
<?php $arr = [ [''], [false], [null], [0], [0.4], [-.1], ["\0"] ]; var_export(array_unique($arr, SORT_REGULAR));
Output for 8.0.1 - 8.0.30, 8.1.0 - 8.1.33, 8.2.0 - 8.2.29, 8.3.0 - 8.3.26, 8.4.1 - 8.4.13
array ( 0 => array ( 0 => '', ), 3 => array ( 0 => 0, ), 4 => array ( 0 => 0.4, ), 5 => array ( 0 => -0.1, ), 6 => array ( 0 => '' . "\0" . '', ), )
preferences:
68.78 ms | 407 KiB | 5 Q