3v4l.org

run code in 300+ PHP versions simultaneously
<?php $user_is_admin = 0; $user_is_owner = 1; $has_permission_1 = $user_is_admin || $user_is_owner; $has_permission_2 = $user_is_admin or $user_is_owner; if ($has_permission_2) echo("Welkom\n"); else echo("Je hebt geen rechten!\n"); if ($user_is_admin or $user_is_owner) echo("Of toch wel...??????\n"); else echo("PHP is awesome"); ?>
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 - 8.1.30, 8.2.0 - 8.2.25, 8.3.0 - 8.3.13
Je hebt geen rechten! Of toch wel...??????

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