Re: classes and variable scope
| From: | Richard Lynch | Date: | Wed, 01 Dec 2004 21:28:45 +0000 |
| Subject: | Re: classes and variable scope | ||
| References: | 1 | Groups: | php.general |
| Request: | Send a blank email to php-general+get-203273@lists.php.net to get a copy of this message | ||
Josh Howe wrote:
>
> Hi all,
>
> If I have the following code:
>
> $some_global_variable;
>
> Class foo {
>
> Function test() {
> set_global();
> echo $some_global_variable;
> }
>
> Function set_global () {
> $some_global_variable = "abcd";
> echo $some_global_variable;
> }
> }
>
> The first echo statement (the one inside the set_global function) prints
> "abcd", but the second prints nothing. How can I set the value of
> $some_global_variable inside the set_global function so that it sticks?
> I'm using PHP 4.3.3.
Choice 1:
Declare it global in both functions.
function test() {
global $some_global_variable;
}
function set_global() {
global $some_global_variable;
}
Choice 2:
Use a member variable instead.
function test(){
echo $this->some_global_variable;
}
function set_global() {
$this->some_global_variable = 'abcd';
}
Choice 3:
Spend more time figuring out why you need a global variable, who needs
this variable, why they need this variable, and re-structure your code so
that you don't really need a global variable. :-)
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