PHP Utility_Files::_instance示例

示例#1

 /**
  * Setter/Getter for an instance of self
  *
  * @param Utility_Files $instance
  * @return Utility_Files
  * @throws Exception when there is no instance set
  */
 public static function init(Utility_Files $instance = null)
 {
     if ($instance) {
         self::$_instance = $instance;
     }
     if (!self::$_instance) {
         throw new Exception('Instance is not set yet.');
     }
     return self::$_instance;
 }