3v4l.org

run code in 150+ php & hhvm versions
Bugs & Features
<?php ini_set('session.use_strict_mode', 1); session_start(); ?>
Output for 5.2.3 - 5.5.1, 5.5.4 - 7.1.0
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 - 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