3v4l.org

run code in 300+ PHP versions simultaneously
<?php ini_set('session.use_strict_mode', 1); session_start(); ?>
Output for 5.2.3 - 5.2.17, 5.3.0 - 5.3.29, 5.4.0 - 5.4.45, 5.5.0 - 5.5.1, 5.5.4 - 5.5.38, 5.6.0 - 5.6.38, 7.0.0 - 7.0.33, 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 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.7
Output for 5.5.2 - 5.5.3
Warning: session_start(): The session id is too long or contains illegal characters, valid characters are a-z, A-Z, 0-9 and '-,' in /in/ZIAKn on line 3 Warning: session_start(): Cannot send session cache limiter - headers already sent (output started at /in/ZIAKn:3) in /in/ZIAKn on line 3
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/ZIAKn on line 3 Warning: session_start(): Cannot send session cache limiter - headers already sent (output started at /in/ZIAKn:3) in /in/ZIAKn 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/ZIAKn 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/ZIAKn:3) in /in/ZIAKn on line 3

preferences:
280.81 ms | 402 KiB | 453 Q