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<?php |
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|
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namespace Box\Spout\Common; |
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|
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/** |
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* Class Singleton |
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* Defines a class as a singleton. |
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* |
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* @package Box\Spout\Common |
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*/ |
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trait Singleton |
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{ |
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protected static $instance; |
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|
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/** |
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* @return static |
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*/ |
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final public static function getInstance() |
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{ |
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return isset(static::$instance) |
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? static::$instance |
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: static::$instance = new static; |
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} |
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|
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/** |
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* Singleton constructor. |
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*/ |
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final private function __construct() |
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{ |
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$this->init(); |
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} |
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|
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/** |
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* Initializes the singleton |
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* @return void |
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*/ |
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protected function init() {} |
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|
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final private function __wakeup() {} |
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final private function __clone() {} |
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} |
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