drupal_bootstrap

Ensures Drupal is bootstrapped to the specified phase.

The bootstrap phase is an integer constant identifying a phase of Drupal to load. Each phase adds to the previous one, so invoking a later phase automatically runs the earlier phases as well. To access the Drupal database from a script without loading anything else, include bootstrap.inc and call drupal_bootstrap(DRUPAL_BOOTSTRAP_DATABASE).

Parameters

$phase: A constant. Allowed values are the DRUPAL_BOOTSTRAP_* constants.

$new_phase: A boolean, set to FALSE if calling drupal_bootstrap from inside a function called from drupal_bootstrap (recursion).

Return value

The most recently completed phase.

8 calls to drupal_bootstrap()

File

includes/bootstrap.inc, line 2106

Functions that need to be loaded on every Drupal request.

Code

function drupal_bootstrap($phase = NULL, $new_phase = TRUE) {
  // Not drupal_static(), because does not depend on any run-time information.
  static $phases = array(
    DRUPAL_BOOTSTRAP_CONFIGURATION,
    DRUPAL_BOOTSTRAP_PAGE_CACHE,
    DRUPAL_BOOTSTRAP_DATABASE,
    DRUPAL_BOOTSTRAP_VARIABLES,
    DRUPAL_BOOTSTRAP_SESSION,
    DRUPAL_BOOTSTRAP_PAGE_HEADER,
    DRUPAL_BOOTSTRAP_LANGUAGE,
    DRUPAL_BOOTSTRAP_FULL,
  );
  // Not drupal_static(), because the only legitimate API to control this is to
  // call drupal_bootstrap() with a new phase parameter.
  static $final_phase;
  // Not drupal_static(), because it's impossible to roll back to an earlier
  // bootstrap state.
  static $stored_phase = -1;

  // When not recursing, store the phase name so it's not forgotten while
  // recursing.
  if ($new_phase) {
    $final_phase = $phase;
  }
  if (isset($phase)) {
    // Call a phase if it has not been called before and is below the requested
    // phase.
    while ($phases && $phase > $stored_phase && $final_phase > $stored_phase) {
      $current_phase = array_shift($phases);

      // This function is re-entrant. Only update the completed phase when the
      // current call actually resulted in a progress in the bootstrap process.
      if ($current_phase > $stored_phase) {
        $stored_phase = $current_phase;
      }

      switch ($current_phase) {
        case DRUPAL_BOOTSTRAP_CONFIGURATION:
          _drupal_bootstrap_configuration();
          break;

        case DRUPAL_BOOTSTRAP_PAGE_CACHE:
          _drupal_bootstrap_page_cache();
          break;

        case DRUPAL_BOOTSTRAP_DATABASE:
          _drupal_bootstrap_database();
          break;

        case DRUPAL_BOOTSTRAP_VARIABLES:
          _drupal_bootstrap_variables();
          break;

        case DRUPAL_BOOTSTRAP_SESSION:
          require_once DRUPAL_ROOT . '/' . variable_get('session_inc', 'includes/session.inc');
          drupal_session_initialize();
          break;

        case DRUPAL_BOOTSTRAP_PAGE_HEADER:
          _drupal_bootstrap_page_header();
          break;

        case DRUPAL_BOOTSTRAP_LANGUAGE:
          drupal_language_initialize();
          break;

        case DRUPAL_BOOTSTRAP_FULL:
          require_once DRUPAL_ROOT . '/includes/common.inc';
          _drupal_bootstrap_full();
          break;
      }
    }
  }
  return $stored_phase;
}