/**
* Get site default global prefix
*
* @return string
*/
static public function getGlobalPrefix()
{
// Provide a fallback for multisite. This is on purpose not inside the
// getPrefixForBin() function in order to decouple the unified prefix
// variable logic and custom module related security logic, that is not
// necessary for all backends. We can't just use HTTP_HOST, as multiple
// hosts might be using the same database. Or, more commonly, a site
// might not be a multisite at all, but might be using Drush leading to
// a separate HTTP_HOST of 'default'. Likewise, we can't rely on
// conf_path(), as settings.php might be modifying what database to
// connect to. To mirror what core does with database caching we use
// the DB credentials to inform our cache key.
if (null === self::$globalPrefix) {
if (isset($GLOBALS['db_url']) && is_string($GLOBALS['db_url'])) {
// Drupal 6 specifics when using the cache_backport module, we
// therefore cannot use \Database class to determine database
// settings.
self::$globalPrefix = md5($GLOBALS['db_url']);
} else {
require_once DRUPAL_ROOT . '/includes/database/database.inc';
$dbInfo = Database::getConnectionInfo();
$active = $dbInfo['default'];
self::$globalPrefix = md5($active['host'] . $active['database'] . $active['prefix']['default']);
}
}
return self::$globalPrefix;
}
/**
* For unit testing only reset internals.
*/
public static function reset()
{
self::$globalPrefix = null;
self::$_clientInterface = null;
self::$_client = null;
}
