On 11 Mar 2012 at 18:16, Tedd Sperling <tedd.sperling@xxxxxxxxx> wrote:
> On Mar 11, 2012, at 10:25 AM, Daniel Brown wrote:
>
>> On Sat, Mar 10, 2012 at 10:37, Tedd Sperling <tedd.sperling@xxxxxxxxx> wrote:
>>> As such, there are no "globals" in PHP other than SuperGlobals. As I said,
>>> if I'm wrong, please show me otherwise.
>>
>> A superglobal is predefined at run-time by the parser,
>> environment, SAPI, etc. (_SERVER, _POST, _GET, _REQUEST, _ENV,
>> _SESSION, _COOKIE), whereas a global can be defined at any time, and
>> is available to the current instance. All superglobals are globals,
>> but not all globals are superglobals.
> Now I'm confused.
>
> My understanding is that all variables defined within the main script are
> accessible within the main script because they are all within scope by
> definition.
>
> Additionally, main script variables are not accessible out of scope (such as
> in a function) unless one uses $GLOBALS to retrieve those values.
In the following, $x is a global but not a super-global (AFAIK).
<?php
function echox ()
{
global $x;
echo $x;
}
$x = "Hello world\n";
echox ();
?>
--
Cheers -- Tim
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