| db_query | includes/database.pgsql.inc | Runs a basic query in the active database. |
| db_result | includes/database.pgsql.inc | Return an individual result field from the previous query. |
| file_create_path | includes/file.inc | Make sure the destination is a complete path and resides in the file system
directory, if it is not prepend the file system directory. |
| hook_file_download | developer/hooks/core.php | Control access to private file downloads and specify HTTP headers. |
| user_access | modules/user/user.module | Determine whether the user has a given privilege. |
