public function input($varName) {
        if (isset($this->parameters[$varName])) {
            return $this->filterVar($this->parameters[$varName]);
        } else {
            return null;
        }
    }
public function input($varName) {
        if (isset($this->parameters[$varName])) {
            return $this->filterVar($this->parameters[$varName]);
        } else {
            return null;
        }
    }
public function input ( $ varName ) { if ( isset ( $ this -> parameters [ $ varName ] ) ) { return $ this -> filterVar ( $ this -> parameters [ $ varName ] ) ; } else { return null ; } }
Get the input var.

@param string $varName name of the var to retrive the value.
@return mixed input
Get the input var .