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Klasa singletona

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 * Singleton 

class ClassName {

	static private $__oInstance;
	private function __construct(){}
        private function __clone(){}
	 * @return ClassName 
	static public function getInstance() {
		if (self::$__oInstance === null) {
			self::$__oInstance = new self();
		return self::$__oInstance;

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