Functions that need to be loaded on every Drupal request.
| Name | Description |
|---|---|
| config_get_config_directory | Returns the path of a configuration directory. |
| drupal_classloader_register | Registers an additional namespace. |
| drupal_generate_test_ua | Generates a user agent string with a HMAC and timestamp for simpletest. |
| drupal_get_filename | Returns and optionally sets the filename for a system resource. |
| drupal_get_messages | Returns all messages that have been set with drupal_set_message(). |
| drupal_get_path | Returns the path to a system item (module, theme, etc.). |
| drupal_get_profile | Gets the name of the currently active installation profile. |
| drupal_get_user_timezone | Returns the time zone of the current user. |
| drupal_installation_attempted | Returns TRUE if a Drupal installation is currently being attempted. |
| drupal_maintenance_theme | Enables use of the theme system without requiring database access. |
| drupal_placeholder Deprecated | Formats text for emphasized display in a placeholder inside a sentence. |
| drupal_register_shutdown_function | Registers a function for execution on shutdown. |
| drupal_set_message | Sets a message to display to the user. |
| drupal_static | Provides central static variable storage. |
| drupal_static_reset | Resets one or all centrally stored static variable(s). |
| drupal_validate_utf8 Deprecated | Checks whether a string is valid UTF-8. |
| drupal_valid_test_ua | Returns the test prefix if this is an internal request from SimpleTest. |
| format_string Deprecated | Formats a string for HTML display by replacing variable placeholders. |
| t | Translates a string to the current language or to a given language. |
| watchdog_exception | Logs an exception. |
| _drupal_error_handler | Provides custom PHP error handling. |
| _drupal_exception_handler | Provides custom PHP exception handling. |
| _drupal_exception_handler_additional | Displays any additional errors caught while handling an exception. |
| _drupal_shutdown_function | Executes registered shutdown functions. |
| _drupal_shutdown_function_handle_exception | Displays and logs any errors that may happen during shutdown. |
| Name | Description |
|---|---|
| CONFIG_ACTIVE_DIRECTORY Deprecated | $config_directories key for active directory. |
| CONFIG_STAGING_DIRECTORY Deprecated | $config_directories key for staging directory. |
| CONFIG_SYNC_DIRECTORY | $config_directories key for sync directory. |
| DRUPAL_ANONYMOUS_RID Deprecated | Role ID for anonymous users; should match what's in the "role" table. |
| DRUPAL_AUTHENTICATED_RID Deprecated | Role ID for authenticated users; should match what's in the "role" table. |
| DRUPAL_EXTENSION_NAME_MAX_LENGTH | The maximum number of characters in a module or theme name. |
| DRUPAL_MINIMUM_PHP | Minimum supported version of PHP. |
| DRUPAL_MINIMUM_PHP_MEMORY_LIMIT | Minimum recommended value of PHP memory_limit. |
| DRUPAL_PHP_FUNCTION_PATTERN | Regular expression to match PHP function names. |
| DRUPAL_ROOT | Defines the root directory of the Drupal installation. |
| ERROR_REPORTING_DISPLAY_ALL | Error reporting level: display all messages. |
| ERROR_REPORTING_DISPLAY_SOME | Error reporting level: display errors and warnings. |
| ERROR_REPORTING_DISPLAY_VERBOSE | Error reporting level: display all messages, plus backtrace information. |
| ERROR_REPORTING_HIDE | Error reporting level: display no errors. |
| REQUEST_TIME | Time of the current request in seconds elapsed since the Unix Epoch. |
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https://api.drupal.org/api/drupal/core!includes!bootstrap.inc/8.1.x