3v4l.org

run code in 300+ PHP versions simultaneously
<?php function getComments(){ $comments = [ "id" => 1, "comment" => "this is test comment", "favorite_users" => [10, 15, 2, 5], ]; return $comments + ['favorite_users_count' => count($comments['favorite_users'])]; } var_dump(getComments());
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 - 8.1.33, 8.2.0 - 8.2.29, 8.3.0 - 8.3.27, 8.4.1 - 8.4.14
array(4) { ["id"]=> int(1) ["comment"]=> string(20) "this is test comment" ["favorite_users"]=> array(4) { [0]=> int(10) [1]=> int(15) [2]=> int(2) [3]=> int(5) } ["favorite_users_count"]=> int(4) }
preferences:
165.66 ms | 408 KiB | 5 Q