3v4l.org

run code in 500+ PHP versions simultaneously
<?php session_name("session1"); session_id('1'); session_start(); echo session_id()."<br>"; session_write_close(); session_name("session2"); session_id('2'); session_start(); echo session_id()."<br>";

preferences:
154.19 ms | 1438 KiB | 5 Q