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Posted by Rob Wilkerson on 11/13/07 23:04
Hey all -
Not being a seasoned PHP developer, tonight I started playing with the
use of the Singleton pattern to store configuration information. What
I was surprised to find was that the instance - at least the one I'm
creating - isn't really a singleton. With each request, the
constructor is called. Isn't that very much *not* a singleton or am I
misunderstanding or doing something wrong? I'm using a pretty simple
case:
class Config
{
private static $instance;
private function __construct() {
echo '<p>Constructing</p>';
}
public static function getInstance()
{
if (!self::$instance)
{
self::$instance = new self();
}
return self::$instance;
}
public function clear() {
echo '<p>clearing...</p>';
self::$instance = null;
}
}
What am I not doing or not understanding?
Any insight would be greatly appreciated.
Rob
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