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    <p>The SessionID is nowhere to be found. I had this problem once, sessions were being created like crazy but nothing got stored. (also, make sure You have proper write permissions to the session folder, once had a problem of that sort as well)</p> <p>What You REALLY want to do, is</p> <p>$sessid = session_start(); // for the beginning of a new session, and</p> <p>session_start($sessid); // at the start request for each subsequent call until session is destroyed using session_destroy()</p> <p>Of course, passing the $sessid variable between webpages is up to You. I prefer to use a &amp;sessid= link additive ;> (that way I immediately know when something's gone awry ;P)</p> <p>Remember, that the only way to ENSURE proper session restoring is to pass on the session ID. I know it's optional, and on most systems it should just work out-of-the-box, but sometimes it just doesn't, and there's simply NO guarantee about session behavior on shared hosting.</p> <p>Just as a protip, try wrapping Your sessions in a class with 'magic' default handlers for __set() and __get(), might make Your life a little easier later on for verifying session data (the __call() handler is esp. useful for that). And make the constructor for the class expect a session id, with 0 (or -1 or whatever) being 'start new session', and make sure it screams errors if the ID isn't set explicitly - that'll alert You to <code>obvious</code> problems.</p> <p>---------[ Edit</p> <p>And oh, did I mention - in a shared environment with lots and lots of user requests, not naming your sessions explicitly can lead to bleed-through problems (one user being logged on as another). For the most part this doesn't happen, but if You have a really screwed-up hosting configuration, not naming Your sessions and relying on 'default behavior' can lead to multiple disasters at once. ;-)</p>
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    1. POPHP Session Data Not Being Stored
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    1. COGoogle keeps the session id in the url.
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    2. COManually passing the session ID around is really not a good solution. That is what the session cookie is for.
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    3. COrisks! even you have to regenerate the session id on every request for security reasons!
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