global $PHP_SELF; purpose?

[makenoiz]

Can someone tell me what some of the purposes of this would be?

global $PHP_SELF;

 

its defined right after a function like this

 

function myFunction(module =' '){
global $PHP_SELF;

....

}

Thanks

 

[requinix]

It's something to do with register_globals. There used to be a variable called $PHP_SELF (which PHP created automatically) and you'd need the global keyword to access it from within a function.

 

But

a) register_globals is bad and should not be enabled, and

b) PHP_SELF is insecure (unless you know what you're doing with it).