Preventing the Defining of Variables through urls
 

Sometimes I use some common variable names in my code, which is passed. How can I prevent that variable from being defined in the url for ex: http://www.domain.com/index.php?hits=1231231231232312
Or is it so that when the variable is already defined, it cannot be defined through url?

Thanks

in the first line of your script you can use unset($hits);

also if the varialbes are sent through a form, they will overwrite the urlvariables

Ah...so what is isset?

So for example, before the rest of the code starts I would put
then define it later?

also can you do this to multiple variables at once like?

Thanks

if you unset the var, you can redifine it later in the script without any problems :)

look into global.php there are a lot of unsets :)

i don't think you can unset more vars in one line...

isset checks if a variable is set, ie has a value assigned to it:

eg:

Ah thanks, I checked on php.net and unsetting multiple variables seems to be possible.

Thanks Guys!