3v4l.org

run code in 200+ php & hhvm versions
Bugs & Features
<?php header('Content-Type: text/html'); if (isset($_SESSION['isLoggedIn']) && $_SESSION['isLoggedIn']===TRUE ) { echo '<a href="html/login.php">Log in</a>'; } else { echo '<a href="html/logout.php">Log out</a>'; } ?>
Output for 4.3.0 - 5.6.30, hhvm-3.10.1 - 3.17.3, 7.0.0 - 7.1.7
<a href="html/logout.php">Log out</a>