Imports GET/POST/Cookie variables into the global scope. It is useful if you disabled register_globals, but would like to see some variables in the global scope.
If you're interested in importing other variables into the global scope, such as SERVER, consider using extract().
Using the types parameter, you can specify which request variables to import. You can use 'G', 'P' and 'C' characters respectively for GET, POST and Cookie. These characters are not case sensitive, so you can also use any combination of 'g', 'p' and 'c'. POST includes the POST uploaded file information.
Note that the order of the letters matters, as when using "gp", the POST variables will overwrite GET variables with the same name. Any other letters than GPC are discarded.
Variable name prefix, prepended before all variable's name imported
into the global scope. So if you have a GET value named "userid", and
provide a prefix "pref_", then you'll get a global variable named
// This will import GET and POST vars
// with an "rvar_" prefix