_drupal_bootstrap_page_cache

Versions

7

_drupal_bootstrap_page_cache()

Bootstrap page cache: Try to serve a page from cache.

Code

includes/bootstrap.inc, line 1556

<?php
function _drupal_bootstrap_page_cache() {
  global $user;

  // Allow specifying special cache handlers in settings.php, like
  // using memcached or files for storing cache information.
  require_once DRUPAL_ROOT . '/' . variable_get('cache_inc', 'includes/cache.inc');
  // Check for a cache mode force from settings.php.
  if (variable_get('page_cache_without_database')) {
    $cache_mode = CACHE_NORMAL;
  }
  else {
    drupal_bootstrap(DRUPAL_BOOTSTRAP_VARIABLES, FALSE);
    $cache_mode = variable_get('cache');
  }
  drupal_block_denied(ip_address());
  // If there is no session cookie and cache is enabled (or forced), try
  // to serve a cached page.
  if (!isset($_COOKIE[session_name()]) && $cache_mode == CACHE_NORMAL) {
    // Make sure there is a user object because it's timestamp will be
    // checked, hook_boot might check for anonymous user etc.
    $user = drupal_anonymous_user();
    // Get the page from the cache.
    $cache = drupal_page_get_cache();
    // If there is a cached page, display it.
    if (is_object($cache)) {
      // If the skipping of the bootstrap hooks is not enforced, call
      // hook_boot.
      if (variable_get('page_cache_invoke_hooks', TRUE)) {
        bootstrap_invoke_all('boot');
      }
      header('X-Drupal-Cache: HIT');
      drupal_serve_page_from_cache($cache);
      // If the skipping of the bootstrap hooks is not enforced, call
      // hook_exit.
      if (variable_get('page_cache_invoke_hooks', TRUE)) {
        bootstrap_invoke_all('exit');
      }
      // We are done.
      exit;
    }
  }
}
?>

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