function _drupal_bootstrap_variables

Loads system variables and all enabled bootstrap modules.

File

includes/bootstrap.inc, line 2837

Code

function _drupal_bootstrap_variables() {
    global $conf;
    // Initialize the lock system.
    require_once DRUPAL_ROOT . '/' . variable_get('lock_inc', 'includes/lock.inc');
    lock_initialize();
    // Load variables from the database, but do not overwrite variables set in settings.php.
    $conf = variable_initialize(isset($conf) ? $conf : array());
    // Load bootstrap modules.
    require_once DRUPAL_ROOT . '/includes/module.inc';
    module_load_all(TRUE);
    // Sanitize the destination parameter (which is often used for redirects) to
    // prevent open redirect attacks leading to other domains. Sanitize both
    // $_GET['destination'] and $_REQUEST['destination'] to protect code that
    // relies on either, but do not sanitize $_POST to avoid interfering with
    // unrelated form submissions. The sanitization happens here because
    // url_is_external() requires the variable system to be available.
    if (isset($_GET['destination']) || isset($_REQUEST['destination'])) {
        require_once DRUPAL_ROOT . '/includes/common.inc';
        // If the destination is an external URL, remove it.
        if (isset($_GET['destination']) && url_is_external($_GET['destination'])) {
            unset($_GET['destination']);
            unset($_REQUEST['destination']);
        }
        // Use the DrupalRequestSanitizer to ensure that the destination's query
        // parameters are not dangerous.
        if (isset($_GET['destination'])) {
            DrupalRequestSanitizer::cleanDestination();
        }
        // If there's still something in $_REQUEST['destination'] that didn't come
        // from $_GET, check it too.
        if (isset($_REQUEST['destination']) && (!isset($_GET['destination']) || $_REQUEST['destination'] != $_GET['destination']) && url_is_external($_REQUEST['destination'])) {
            unset($_REQUEST['destination']);
        }
    }
}