Re: questions about $_SERVER

On Mar 9, 2012, at 10:20 PM, Jim Giner wrote: > "tamouse mailing lists" <tamouse.lists@gmail.com> wrote in message > > news:CAHUC_t8g43GE3xqvSU5SwFePGS1XG=TK1MhRbem9GjAArVEd8g@mail.gmail.com.... >> On Mon, Feb 13, 2012 at 2:39 PM, Tedd Sperling <tedd.sperling@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. Cheers, tedd _____________________ tedd.sperling@gmail.com http://sperling.com