3v4l.org

run code in 150+ php & hhvm versions
Bugs & Features
html <?php session_start(); $_SESSION['hello'] = 'test';
Output for 4.3.2 - 7.1.0
html Warning: session_start(): Cannot send session cookie - headers already sent by (output started at /in/Fp0X1:3) in /in/Fp0X1 on line 5 Warning: session_start(): Cannot send session cache limiter - headers already sent (output started at /in/Fp0X1:3) in /in/Fp0X1 on line 5
Output for 4.3.0 - 4.3.1
html Warning: session_start() [http://www.php.net/function.session-start]: Cannot send session cookie - headers already sent by (output started at /in/Fp0X1:3) in /in/Fp0X1 on line 5 Warning: session_start() [http://www.php.net/function.session-start]: Cannot send session cache limiter - headers already sent (output started at /in/Fp0X1:3) in /in/Fp0X1 on line 5