db_is_active

Versionen
drupal6 – drupal7	`db_is_active()`

Determine if there is an active connection.

Note that this method will return FALSE if no connection has been established yet, even if one could be.

TRUE if there is at least one database connection established, FALSE otherwise.

drupal_get_filename in includes/bootstrap.inc: Returns and optionally sets the filename for a system item (module, theme, etc.). The filename, whether provided, cached, or retrieved from the database, is only returned if the file exists.
list_themes in includes/theme.inc: Return a list of all currently available themes.
template_preprocess in includes/theme.inc: Adds a default set of helper variables for preprocess functions and templates. This comes in before any other preprocess function which makes it possible to be used in default theme implementations (non-overriden theme functions).

includes/database/database.inc, line 1988

<?php
function db_is_active() {
  return Database::isActiveConnection();
}
?>

DrupalAPI.de