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Posted by Toby A Inkster on 02/14/07 17:08
Oliver Grätz wrote:
> - Global variables in PHP are not as global as they are in other
> languages where you can sometimes always see the global variables. Some
> languages even have the keyword "local" to prohibit a variable from
> becoming global. PHP instead has the "global" keyword to define a
> variable as global.
In PHP the global keyword basically pulls a variable from the global
namespace into the local namespace.
What most other languages refer to as "globals" PHP calls "superglobals".
There's no way to define superglobals though -- PHP defines a few on its
own (depends on your version, but in recent ones, $_POST, $_GET, $SERVER,
$_SESSIOM, $_ENV, $_FILES and $GLOBALS) and you're stuck with them.
Although I steer away from globals (in my current project, over 4000 lines
of PHP so far, and not a single global!), sometimes I really would
appreciate having a method of defining superglobals. Not going to happen
though. :-(
--
Toby A Inkster BSc (Hons) ARCS
Contact Me ~ http://tobyinkster.co.uk/contact
Geek of ~ HTML/SQL/Perl/PHP/Python*/Apache/Linux
* = I'm getting there!
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