public function getFilterValue($value)
    {
        if (($value !== 0 && $value !== '0' && empty($value)) || (is_string($value) && trim($value) === '')) {
            return false;
        } else {
            return $value;
        }
    }
public function getFilterValue($value)
    {
        if (($value !== 0 && $value !== '0' && empty($value)) || (is_string($value) && trim($value) === '')) {
            return false;
        } else {
            return $value;
        }
    }
public function getFilterValue ( $ value ) { if ( ( $ value !== 0 && $ value !== '0' && empty ( $ value ) ) || ( is_string ( $ value ) && trim ( $ value ) === '' ) ) { return false ; } else { return $ value ; } }
Helper function to determine if a filter value should be considered "empty" or not.

@param string 	value

@return false|string
Helper function to determine if a filter value should be considered empty or not .