Why won't this work?

[Skute]

Hi, I've got a problem with a class, can you tell me what the problem is?

[a.php]
<?php
$g_a = "hello";
?>

[b.php]

require_once("a.php");

echo $g_a;

class Test
{
public static function GetA()
{
if ($g_a == null || $g_a == "")
throw new Exception("$g_a is an invalid value!");

return $g_a;
}
}


When loading b.php the echo correctly outputs "hello", but when i use Test::GetA() an exception gets thrown every time. Why can't my static functions in the class view the global variable?

Thanks

Skute

&quot;There are 10 types of people in this World, those that understand binary, and those that don't!&quot;

 

[jpadie]

because $g_a is not a superglobal variable. the fact that it is dimensioned and set outside the scope of a function or a class does not per se make it so global as to be available in the class or function. i think that "global" is a misnoma.

use the global language construct to make a global variable accessible within the scope of a function. or pass its value by reference to your constructor. or reference $GLOBALS['g_a'] instead.

 

[Skute]

OK, thanks, I'll try that. I have made the constructor private so that you can't instantiate an instance of it (it will have several static functions which just return values in another file)

Skute

&quot;There are 10 types of people in this World, those that understand binary, and those that don't!&quot;

 

[jpadie]

here is a link to the php manual reference on variable scope. i'm not 100% certain that the global construct works in classes. i haven't tested it.

http://fr.php.net/manual/en/language.variables.scope.php