public function multiple($value)
    {
        $value = $this->sanitise($value);

        switch (substr($value, -1)) {
            case '*':
            case '+':
                break;
            default:
                $value .= '+';
        }

        return $this->add($value);
    }
public function multiple($value)
    {
        $value = $this->sanitise($value);

        switch (substr($value, -1)) {
            case '*':
            case '+':
                break;
            default:
                $value .= '+';
        }

        return $this->add($value);
    }
public function multiple ( $ value ) { $ value = $ this -> sanitise ( $ value ) ; switch ( substr ( $ value , - 1 ) ) { case '*' : case '+' : break ; default : $ value .= '+' ; } return $ this -> add ( $ value ) ; }
Shortcut for adding multiples

@param string $value Value to be multiples

@return $this
Shortcut for adding multiples