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PHP/MySQL and secure user submissions


Dragoon

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A project I'm working on involves allowing users to submit content (text/URLs, mainly) via form, which will be added to the same database as approved content (with an "unapproved" status). However, due to my relative ignorance with PHP, I'm hesitant to do this without more info regarding how to prevent abuse/exploitation of the system.

 

Any suggestions?

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All POST / GET / COOKIE data should be checked for validity, e.g. is it empty, is there any sql injections (http://uk3.php.net/manual/en/function.mysql-real-escape-string.php), is there any characters that shouldn't be in there, is there code when there shouldn't (e.g. html, bb, php, javascript, vbscript, etc), you might want to run checks against a list of banned words. There's examples of how to deal with each of these somewhere within this forum...

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