Re: [dcphp-dev] Global Variables Question

This use is mostly a hangover from when PHP development was more procedural than object-oriented.  I agree it is best avoided altogether, but it can be used when you need to access a global variable while inside a function.

The discussion of static variables in the manual's entry on variable scope is fruitful reading: http://php.net/manual/en/language.variables.scope.php.

--dan mills

On Sun, Mar 26, 2017 at 10:08 AM, Whitney Yiu <wyiu416@gmail.com> wrote:

Hi all,

I am reading a book (PHP and MySQL Web Development - Thomson, Welling; 5th Ed.; Addison-Wesley) and am trying to understand the following passage regarding global variables:

You can also use the global keyword at the top of a script when a variable is first used to declare that it should be in scope throughout the script. This is possibly a more common use of the global keyword.

Can someone explain a use case for using a global variable at the top of a script? I thought that if a variable is declared outside of a function, then it is accessible throughout the script (except inside functions). I think I am missing something here.

Thanks,

Whitney 

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