Error On Making Class Static Опции

[davidcave]

Hello, i am trying to convert my class into a static one. The problem is now, when i try to get results of an database it gives me this error:
Quote
Fatal error: Call to a member function prepare() on null in F:\xampp\htdocs\Zorg4You\inc\database.inc.php on line 42


and this is line 42:

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$stmt = self::$db->prepare($query);


i made the variable $db also static:

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static protected $db;


This is the call to the function from the page:

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$result = database::getRows("SELECT * FROM Activiteiten");


Can anyone tell me what i am doing wrong?

Please help...

I didn't find the right solution from the Internet.
References
http://www.dreamincode.net/forums/topic/40...g-class-static/
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