Re: Local variable protection

Quoting Benjamin Coddington <bcodding@uvm.edu>:

Are there any assurances that function local variables are protected from code calling the function? For example, I would like to provide some cryptographic functions such as function org_secure_string($string) { $org_key = "a very random key"; return hash($string, $key); } function org_reveal_string($hash) { $org_key = "a very random key"; return unhash($hash, $key); } I'd like to protect $org_key from any code following or using these functions. I've not yet found a way that it can be revealed, but I wonder if anyone here can give me a definitive answer whether or not it is possible.

It's called the scope of the variable. See http://us3.php.net/manual/en/language.variables.scope.php Variables defined in a function are only available to the function where they are defined. Ken