3v4l.org

run code in 500+ PHP versions simultaneously
<?php session_start(); unset($_SESSION['logged']); //logged to zmienna sesyjna istniejąca tylko wtedy gdy użytkownik jest zalogowany header('Location: index.php');
Output for 5.2.3 - 5.2.17, 5.3.0 - 5.3.29, 5.4.0 - 5.4.45, 5.5.0 - 5.5.38, 5.6.0 - 5.6.40, 7.0.0 - 7.0.33, 7.1.0 - 7.1.27, 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 - 8.1.34, 8.2.0 - 8.2.31, 8.3.0 - 8.3.31, 8.4.1 - 8.4.22, 8.5.0 - 8.5.7
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/vVeuV on line 3 Warning: session_start(): Cannot send session cache limiter - headers already sent (output started at /in/vVeuV:3) in /in/vVeuV on line 3
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/vVeuV on line 3 Warning: session_start() [http://www.php.net/function.session-start]: Cannot send session cache limiter - headers already sent (output started at /in/vVeuV:3) in /in/vVeuV on line 3
preferences:
110.8 ms | 2491 KiB | 4 Q