Calling Drupal functions in external PHP file

Question

How can I call a Drupal function or get the global variable in a PHP file which is located under the drupal installation folder. I doing it for the first time. Are there any

Answer 1

Taken from the linked question in the comment above

You need to Bootstrap Drupal in the external PHP file:

/** bootstrap Drupal **/
chdir("/path/to/drupal/site/htdocs");
require_once './includes/bootstrap.inc';
drupal_bootstrap(DRUPAL_BOOTSTRAP_FULL);

Be sure to change the path to your Drupal installation, then add your code below the code posted above.