Re: When is a global not a global?
| From: | Richard Lynch | Date: | Thu, 13 Jul 2006 18:49:41 +0000 |
| Subject: | Re: When is a global not a global? | ||
| References: | 1 | Groups: | php.general |
| Request: | Send a blank email to php-general+get-239430@lists.php.net to get a copy of this message | ||
On Wed, July 12, 2006 5:52 pm, Nick Wilson wrote:
> After upgrading a CMS, im having a problem with global variables not
> showing up anymore -- configs and things could have changed, but
> search
> as i have, i cannot find anything to help me work out what the problem
> is.
>
> This should work of course:
>
> $foo = 'bar';
>
> function foobar() {
> global $foo;
> print(" ------ " . $foo);
> exit;
> }
>
> foobar();
>
> It prints *nothing*. Does anyone have an idea as to what might stop
> this
> from functioning as expected?
The only time I have seen this is when what REALLY happens is like this:
<?php
//The CMS code has something like:
function cms_include_user_code ($file){
include $file;
}
?>
<?php
//some of your code, pulled in through $file above:
$foo = 'bar';
?>
<?php
//More of your code, the $file above, has this:
function foobar()
global $foo;
echo "in foobar, foo is $foo<br />\n";
}
?>
So, if you work through it, you'll see that your $foo = 'bar'; happens
*INSIDE* the cms_include_user_code function.
So it's not that global isn't working.
It's that you need:
<?php
global $foo;
$foo = 'bar';
?>
in that first file, so that your $foo buried inside the CMS function
is global, instead of local to their cms_include_user_code function.
--
Like Music?
http://l-i-e.com/artists.htm