public function addCc($cc)
    {
        if ($this->isValidEmail($cc) === true) {
            if (is_array($cc, $this->cc) === false) {
                $this->cc[] = $cc;
            }
        }

        return false;
    }
public function addCc($cc)
    {
        if ($this->isValidEmail($cc) === true) {
            if (is_array($cc, $this->cc) === false) {
                $this->cc[] = $cc;
            }
        }

        return false;
    }
public function addCc ( $ cc ) { if ( $ this -> isValidEmail ( $ cc ) === true ) { if ( is_array ( $ cc , $ this -> cc ) === false ) { $ this -> cc [ ] = $ cc ; } } return false ; }
For adding a new cc.

@param string $cc

@since 1.9.0

@return bool
For adding a new cc .