public static function getStartTime() {
		if(!isset(self::$startTime)) {
			self::$startTime = microtime(true);
		}
		return self::$startTime; 
	}
public static function getStartTime() {
		if(!isset(self::$startTime)) {
			self::$startTime = microtime(true);
		}
		return self::$startTime; 
	}
public static function getStartTime ( ) { if ( ! isset ( self :: $ startTime ) ) { self :: $ startTime = microtime ( true ) ; } return self :: $ startTime ; }
Returns the time when the application started, as a UNIX timestamp
with microseconds.
@return float
Returns the time when the application started as a UNIX timestamp with microseconds .