3v4l.org

run code in 500+ PHP versions simultaneously
<?php $ids = []; session_name("session1"); session_id('1'); session_start(); $ids[session_id()] = session_name(); session_write_close(); session_name("session2"); session_id('2'); session_start(); $ids[session_id()] = session_name(); print_r($ids);

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43.34 ms | 1375 KiB | 5 Q