| Re: Globalizing vars in class methods doesnt seem to work, var disappears after global, var is inaccessible in other methods/funcs [message #178792 is a reply to message #178789] |
Sat, 04 August 2012 17:18   |
M. Strobel
Messages: 386
Registered: December 2011
Karma:
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Senior Member |
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Am 03.08.2012 19:45, schrieb J. Frank Parnell:
> <?php
> class test{
> function __construct(){
> $this->makevar();
> global $var;
> echo '<hr>__const(): '.$var;
> }
> function makevar(){
> $var = 'something';
> echo '<hr>just declared in makevar(): '.$var;
> global $var;
> echo '<hr>after global in makevar(): '.$var;
> }
> }//class
>
> $t = new test;
> echo '<hr>outside class: '.$var;
> global $var;
> echo '<hr>outside class after global: '.$var;
>
> ?>
> this outputs:
> just declared in makevar(): something
> after global in makevar(): [nothing]
> __const():[nothing]
> outside class: [nothing]
> outside class after global: [nothing]
>
>
> So, 1, why does global $var in the makevar() make it null?
> and B, why dont I have any access to $var in the __constructor or outside the class?
>
Your code is nonsense, you have to declare a variable as global _before_ using it.
> In the real script, $var will be an instance of a different class that I want to use all over the place.
>
Have a look at the singleton pattern.
/Str.
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