note 53176 deleted from function.isset by googleguy

Note Submitter: darkstar_ae at hotmail dot com ---- isset doesn't reliably evaluate variables with blank strings (not necessarily NULL). i.e. $blankvar = ""; // isset will return true on this. This is a very common pitfall when handling HTML forms that return blank text fields to the script. You're better off doing this: if ($var != "") return true; else return false; This more of a programming practice rather than the function's shortcomings. So if you have a habit of initializing variables you're likely to run into problems with isset() if your code or php project become very large.