3v4l.org

run code in 200+ php & hhvm versions
Bugs & Features
<?php ob_start(); $a+$b; ob_end(); session_start(); echo session_id();
Output for 7.1.23
Notice: Undefined variable: a in /in/kUXUF on line 3 Notice: Undefined variable: b in /in/kUXUF on line 3 Fatal error: Uncaught Error: Call to undefined function ob_end() in /in/kUXUF:4 Stack trace: #0 {main} thrown in /in/kUXUF on line 4
Process exited with code 255.