"Tedd Sperling" <tedd.sperl...@gmail.com> wrote in message 
On Mar 9, 2012, at 10:20 PM, Jim Giner wrote:
> "tamouse mailing lists" <tamouse.li...@gmail.com> wrote in message
> news:CAHUC_t8g43GE3xqvSU5SwFePGS1XG=tk1mhrbem9gjaarve...@mail.gmail.com...
>> On Mon, Feb 13, 2012 at 2:39 PM, Tedd Sperling <tedd.sperl...@gmail.com>
>> wrote:
>>> On Feb 13, 2012, at 4:10 AM, Stuart Dallas wrote:
>>>> On 13 Feb 2012, at 06:28, Rui Hu wrote:
>>>>> How PHP sets variables in $_SERVER, say, $DOCUMENT_ROOT? What should I
>>>>> know
>>>>> if I want to modify $_SERVER myself?
>>>> Once your script starts the superglobals are no different to any other
>>>> variables, except that they're in scope at all times.
>>> That's probably the reason why they are named "SuperGlobals". :-)
>>> But to be more descriptive, these are simply globals that are predefined
>>> by php -- see:
>>> http://php.net/manual/en/language.variables.superglobals.php
>>> I believe, (please show me otherwise) there are no "globals" in PHP 
>>> other
>>> than SuperGlobals.
>> Assuming you mean pre-defined ones, there shouldn't be, since no other
>> ones are documented. If there are, then either they should be
>> documented, or they should be ignored as it can be dangerous to use
>> undocumented features. :)
> Just to be clear - you asked if it were true that "there are no "globals" 
> in
> PHP other than SuperGlobals:  Don't forget that anything that you declare 
> as
> global in a script is a global for that instance of that script (and
> whatever includes, etc. that it calls during its run)

That's correct, but to access those variables outside of their scope (such 
as a function) you do via a SuperGlobal, namely $GLOBAL['whatever'].

As such, there are no "globals" in PHP other than SuperGlobals. As I said, 
if I'm wrong, please show me otherwise.


Actually - I've never used "$GLOBAL" - I've just referenced them by their 
name as specified in the "global" statement - so it's not always obvious 
that a specific var IS a global.    I can see thought that you are aware of 
them so my point is unnecessary. 

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