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PHP TMP Directory

Posted on 2006-11-25
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Hi! I was wondering how temporary files are handled when uploaded in php... Uploaded files are initially stored in the tmp directory - do they get automatically deleted or does it have to be done manually ? Is it done by php, do I have to write a script or is it done by the server periodically, e.g. Cron ?
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Question by:Julian Matz
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by:TeRReF
ID: 18012401
You use move_uploaded_file() for this purpose:
http://php.net/manual/en/function.move-uploaded-file.php
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by:Julian Matz
ID: 18012421
Hi TeRReF,

Yes, I know about that function, but I was thinking about files that maybe fail to get moved, etc.
Does that make sense ? Session data gets stored there too, doesn't it ?

Just looked into the server's tmp directory - there's a lot of session data but only very recent... But there are also some files there that are a couple of months old - one of them seems to be an image:

Oct 15 01:45 phpaMbFwY.jpg
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TeRReF earned 2000 total points
ID: 18012462
Hi Julian,

You're right, by default, session data is stored there as well. Those older files are probably interrupted uploads or something similar.

Usually it's not necessary to clean up your /tmp dir, unless it's on a small partition. Most *NIX systems clean the /tmp dir after a reboot or with a cron job of their own. Also, most tmp files are only a couple of KB's so they won't fill up /tmp that easily.

Since you have files that are a couple of months old, either your server has been up quite a while now or there is no automatic cleaning in place. So, if you do want to remove some PHP specific junk from it, I think a cron job will serve you well.
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by:Julian Matz
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Thanks!
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by:TeRReF
ID: 18110456
You're welcome :)
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