12.8. Using the Gdata Data Helper
Zurück | Kapitel 12. Zend_Gdata | Weiter

## 12.8. Using the Gdata Data Helper

Many parameters of Google Data queries have a restricted set of supported values. The `Zend_Gdata_Data` class contains constant definitions for all the legal values.

The `isValid()` static function tests that a value is valid for a specified attribute. The example below shows usage of a constant, and a test of that constant using `isValid()`.

    <?php
    require_once 'Zend/Gdata/Data.php';
    $vis = Zend_Gdata_Data::VIS_PRIVATE;
    if (Zend_Gdata_Data::isValid($vis, 'visibility')) {
        ...
    }
    ?>

The `getValues()` static function returns an array of valid values for a specified attribute.

    <?php
    $visValueArray = Zend_Gdata_Data::getValues('visibility');
    ?>

Zurück | Nach oben | Weiter
12.7. Using Google CodeSearch | Zum Anfang | 12.9. Catching Gdata Exceptions