3v4l.org

run code in 200+ php & hhvm versions
Bugs & Features
<?php var_dump(session_start()); var_dump(session_start());
based on SZYED
Output for 7.2.0 - 7.3.0alpha1
bool(true) Notice: session_start(): A session had already been started - ignoring in /in/2PQKb on line 3 bool(true)
Output for 5.6.0 - 7.1.7
bool(true) Notice: A session had already been started - ignoring session_start() in /in/2PQKb on line 3 bool(true)