573. 
574.         foreach( $getCaptchaImages as $image)
575.         {
576.             if( $this->name() !== $image )
577.             {
578.                 $captcha = $this->path . $image;
579. 
580.                 if( is_file($captcha) )
581.                 {
582. 
                    unlink($captcha);
583.                 }
584.             }      
585.         } 
586.     }
587. 
588.     /**
589.      * protected captcha name
590.      * 
591.      * @param void
592.      *