3v4l.org

run code in 150+ 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 - 5.6.28, hhvm-3.10.0 - 3.12.0, 7.0.0 - 7.1.0
<a href="html/logout.php">Log out</a>