3v4l.org

run code in 150+ php & hhvm versions
Bugs & Features
<?php session_start(); print_r($_SESSION);
Output for 5.2.3 - 5.6.28, hhvm-3.10.0 - 3.12.0, 7.0.0 - 7.1.0
Array ( )
Output for 4.3.2 - 5.2.2
Warning: session_start(): Cannot send session cookie - headers already sent in /in/80F8v on line 2 Warning: session_start(): Cannot send session cache limiter - headers already sent (output started at /in/80F8v:2) in /in/80F8v on line 2 Array ( )
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/80F8v 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/80F8v:2) in /in/80F8v on line 2 Array ( )