3v4l.org

run code in 300+ PHP versions simultaneously
<?php declare(strict_types=1); $processor = function ($data) { $data = htmlentities($data); $data = str_split($data); $data = (fn ($x) => array_map(strtoupper(...), $x))($data); $data = (fn ($x) => array_filter($x, fn ($v) => $v != 'O'))($data); return $data; }; $data = "Hello World!"; var_dump( $data, $processor($data), );
Output for 8.2.0 - 8.2.29, 8.3.0 - 8.3.25, 8.4.1 - 8.4.12
string(12) "Hello World!" array(10) { [0]=> string(1) "H" [1]=> string(1) "E" [2]=> string(1) "L" [3]=> string(1) "L" [5]=> string(1) " " [6]=> string(1) "W" [8]=> string(1) "R" [9]=> string(1) "L" [10]=> string(1) "D" [11]=> string(1) "!" }
preferences:
45.6 ms | 407 KiB | 5 Q