44 lines
1.1 KiB
PHP
44 lines
1.1 KiB
PHP
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<?php
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namespace DDDBL;
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/**
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* simple implementation of generic singleton
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* for all classes, which allows additional instances
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* if needed
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*
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**/
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class Singleton {
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/**
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* @param $strClass - the class we want an instance from
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*
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* @throws UnexpectedParameterTypeException - if given parameter is not a string
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* @throws \Exception - if given class do not exists
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*
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* @return (object) - an instance of the given classname
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*
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* get a reference to the instance of the given class.
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* if instance do not exists, create one. after creation
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* always return reference to this reference
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*
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**/
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static function getInstance($strClass) {
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if(!is_string($strClass))
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throw new UnexpectedParameterTypeException('string', $strClass);
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if(!class_exists($strClass))
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throw new \Exception ("class do not exists: $strClass");
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static $arrObjectList = array();
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if(!isset($arrObjectList[$strClass]))
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$arrObjectList[$strClass] = new $strClass();
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return $arrObjectList[$strClass];
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}
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}
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