mvc/View.php
/**
     * Get view helper
     * @param string $nickname
     */
Get view helper
@param string $nickname
Get view helper @param string $nickname
public function helper($nickname) {
        if (! isset($nickname, $this->_helpers)) {
            throw new \UnexpectedValueException('view helper not exists: ' . $nickname);
        }
        return $this->_helpers[$nickname];
    }
public function helper ( $ nickname ) { if ( ! isset ( $ nickname , $ this -> _helpers ) ) { throw new \ UnexpectedValueException ( 'view helper not exists: ' . $ nickname ) ; } return $ this -> _helpers [ $ nickname ] ; }
Get view helper
 @param string $nickname
Get view helper @param string $nickname