572. 
573.         foreach( $getCaptchaImages as $image)
574.         {
575.             if( $this->name() !== $image )
576.             {
577.                 $captcha = $this->path . $image;
578. 
579.                 if( is_file($captcha) )
580.                 {
581. 
                    unlink($captcha);
582.                 }
583.             }      
584.         } 
585.     }
586. 
587.     /**
588.      * protected captcha name
589.      * 
590.      * @param void
591.      *