function fast_404 | Documentation

1 bootstrap.inc fast_404()

Returns a simple 404 Not Found page.

If fast 404 pages are enabled, and this is a matching page then print a simple 404 page and exit.

This function is called from backdrop_deliver_html_page() at the time when a a normal 404 page is generated, but it can also optionally be called directly from settings.php to prevent a Backdrop bootstrap on these pages. See documentation in settings.php for the benefits and drawbacks of using this.

Paths to dynamically-generated content, such as image styles, should also be accounted for in this function.

2 calls to fast_404()

backdrop_deliver_html_page in core/includes/common.inc: Packages and sends the result of a page callback to the browser as HTML.
drupal_fast_404 in core/includes/drupal.inc: Returns a simple 404 Not Found page.

File

core/includes/bootstrap.inc, line 3499: Functions that need to be loaded on every Backdrop request.

Code

function fast_404() {
  $exclude_paths = settings_get('404_fast_paths_exclude', FALSE);
  if ($exclude_paths && !preg_match($exclude_paths, $_GET['q'])) {
    $fast_paths = settings_get('404_fast_paths', FALSE);
    if ($fast_paths && preg_match($fast_paths, $_GET['q'])) {
      backdrop_add_http_header('Status', '404 Not Found');
      $fast_404_html = settings_get('404_fast_html', '<!DOCTYPE html><html><head><title>404 Not Found</title></head><body><h1>Not Found</h1><p>The requested URL "@path" was not found on this server.</p></body></html>');
      // Replace @path in the variable with the page path.
      print strtr($fast_404_html, array('@path' => check_plain(request_uri())));
      exit;
    }
  }
}