3v4l.org

run code in 300+ PHP versions simultaneously
<?php session_start(); $_SESSION['flag'] = 0; ?> <html> <head> </head> <body> <!-- page content here --> <?php var_dump($_SESSION['flag']); ?> <?php if ($_SESSION['flag'] === 0): ?> <script src="loggedIn.js"></script> <?php else: ?> <script src="loggedOut.js"></script> <?php endif; ?> </body> </html>
Output for 5.2.3 - 5.2.17, 5.3.0 - 5.3.29, 5.4.0 - 5.4.45, 5.5.24 - 5.5.35, 5.6.8 - 5.6.21, 7.0.0 - 7.0.20, 7.1.0 - 7.1.10, 7.2.0 - 7.2.33, 7.3.16 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.27, 8.2.0 - 8.2.17, 8.3.0 - 8.3.4
<html> <head> </head> <body> <!-- page content here --> int(0) <script src="loggedIn.js"></script> </body> </html>
Output for 4.3.2 - 4.3.11, 4.4.0 - 4.4.9, 5.0.0 - 5.0.5, 5.1.0 - 5.1.6, 5.2.0 - 5.2.2
Warning: session_start(): Cannot send session cookie - headers already sent in /in/PtmHb on line 2 Warning: session_start(): Cannot send session cache limiter - headers already sent (output started at /in/PtmHb:2) in /in/PtmHb on line 2 <html> <head> </head> <body> <!-- page content here --> int(0) <script src="loggedIn.js"></script> </body> </html>
Output for 4.3.0 - 4.3.1
Warning: session_start() [http://www.php.net/function.session-start]: Cannot send session cookie - headers already sent in /in/PtmHb on line 2 Warning: session_start() [http://www.php.net/function.session-start]: Cannot send session cache limiter - headers already sent (output started at /in/PtmHb:2) in /in/PtmHb on line 2 <html> <head> </head> <body> <!-- page content here --> int(0) <script src="loggedIn.js"></script> </body> </html>

preferences:
185.04 ms | 402 KiB | 305 Q