note 85433 added to function.session-regenerate-id

This can be a very dangerous function if you're not careful about how you handle things, because even though it generates a whole new set of session data, it keeps the old data "open" until the script terminates, locking out any other scripts trying to run concurrently with the old session id. Recently I came across a situation where I wanted to explicitly pass in a session ID, copy the data from that session into a *new* session, and then continue operating under that new session, thereby allowing other scripts to use the old one concurrently. But I quickly found that these "other scripts" would not execute until the first script finished--even though it had already started a new session--because it kept the old session open. So if you're trying to copy over session data to a new session to free up the old session for continued, concurrent use, here's some code to ensure nobody's feet get stepped on: <?php // get session id of an existing session $sid = $_GET['sid']; // start the old session to retrieve $_SESSION data session_id($sid); session_start(); // start a new session; this copies the $_SESSION data over session_regenerate_id(); // hang on to the new session id $sid = session_id(); // close the old and new sessions session_write_close(); // re-open the new session session_id($sid); session_start(); /* main code here */ ?> This could probably be encapsulated into a function with one parameter as well to save space if it was a repeated thing. ---- Server IP: 64.71.164.2 Probable Submitter: 66.170.10.66 ---- Manual Page -- http://www.php.net/manual/en/function.session-regenerate-id.php Edit -- https://master.php.net/note/edit/85433 Del: integrated -- https://master.php.net/note/delete/85433/integrated Del: useless -- https://master.php.net/note/delete/85433/useless Del: bad code -- https://master.php.net/note/delete/85433/bad+code Del: spam -- https://master.php.net/note/delete/85433/spam Del: non-english -- https://master.php.net/note/delete/85433/non-english Del: in docs -- https://master.php.net/note/delete/85433/in+docs Del: other reasons-- https://master.php.net/note/delete/85433 Reject -- https://master.php.net/note/reject/85433 Search -- https://master.php.net/manage/user-notes.php