Posted by Charles O'Flynn on 09/27/06 07:28

"Oli Filth" <catch@olifilth.co.uk> wrote in message
news:fEiSg.32264$TF5.8307@newsfe1-win.ntli.net...
| Jerry Stuckle said the following on 26/09/2006 22:07:
| > Charles O'Flynn wrote:
| >> Thanks for the quick reply, Johnny, but I've been looking at the page
you
| >> refer to all afternoon and it doesn't seem to work for me. For
instance,
| >> (and I'm only illustrating the specific problem I seem to have
| >> hereunder)...
| >> ------------------------------------
| >> $variable;
| >>
| >> function printsomething()
| >> {
| >> global $variable;
| >>
| >> $variable = 'Test'.<b />;
| >> echo $variable;
| >> }
| >>
| >> printsomething();
| >> echo $variable;
| >> ------------------------------------
| >>
| >> ...only prints one line of 'Test' - I'd have thought it should print
| >> out two
| >> copies. BTW, I'm running under PHP 4.1.2 (and it's not mine to
| >> change/upgrade!)
| >
| > You're close. But you have to use the global keyword in the global
| > context, also. Not just in the function.
|
| Umm, no you don't!
|
http://uk.php.net/manual/en/language.variables.scope.php#language.variables.scope.global
|
| >
| > global $variable;
| >
| > function printsomething()
| > {
| > global $variable;
| >
| > $variable = 'Test'.<b />;
| > echo $variable;
| > }
| >
| > printsomething();
| > echo $variable;
| >
|
|
| --
| Oli


Thanks, Oli
I'm getting the feeling, (although noone's spelling it out either here or in
any of the myriad books I've looked at for inspiration), that declaring a
variable as global inside a function will make it accessible outside the
function at the global scope; in other words, what I've done above is
declare two independent variables, the one outside the function over-riding
the effect of the one inside the function.. OK - I can test this very
quickly. But if so, how on earth do I get to access it within another
function, or does this automatically make it visible everywhere?
Of course, I could store the data within MySQL, thereby making it
persistent, but this seems like overkill. How does PHP make variables
accessible with 'real' global scope, not just 'global, except inside
functions', which for an old 'C' programmer like me, is not global at all?
I know, in theory about superglobals but again, this seems like overkill.
Or am I being silly?
Thanks,
Charles

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