Documentation & API reference
Constants
Primary tabs
| Name | Location | Description |
Direct uses |
Strings |
|---|---|---|---|---|
| MAINTENANCE_MODE |
drupal/ |
Global flag indicating that update.php is being run. | 10 | 20 |
| REQUIREMENT_OK |
drupal/ |
Requirement severity -- Requirement successfully met. | 9 | 1 |
| MENU_SITE_OFFLINE |
drupal/ |
Internal menu status code -- Menu item inaccessible because site is offline. | 9 | 1 |
| WATCHDOG_INFO |
drupal/ |
Log message severity -- Informational messages. | 9 | 1 |
| LANGUAGE_LTR |
drupal/ |
Language written left to right. Possible value of $language->direction. | 9 | 1 |
| COMMENT_NODE_HIDDEN |
drupal/ |
Comments for this node are hidden. | 9 | 1 |
| SCHEMA_UNINSTALLED |
drupal/ |
Indicates that a module has not been installed yet. | 8 | 1 |
| DRUPAL_CACHE_PER_ROLE |
drupal/ |
The block or element can change depending on the user's roles. | 8 | 1 |
| MENU_VISIBLE_IN_BREADCRUMB |
drupal/ |
Internal menu flag -- menu item is visible in the breadcrumb. | 8 | 1 |
| UPDATE_NOT_SECURE |
drupal/ |
Project is missing security update(s). | 8 | 1 |
| COMMENT_FORM_BELOW |
drupal/ |
Comment form should be shown below post or list of comments. | 8 | 1 |
| FILE_READABLE |
drupal/ |
File permission check -- File is readable. | 7 | 1 |
| LOCALE_LANGUAGE_NEGOTIATION_URL_PREFIX |
drupal/ |
URL language negotiation: use the path prefix as URL language indicator. | 7 | 1 |
| LANGUAGE_NEGOTIATION_DEFAULT |
drupal/ |
No language negotiation. The default language is used. | 7 | 1 |
| DRUPAL_MINIMUM_PHP |
drupal/ |
Minimum supported version of PHP. | 7 | 1 |
| LANGUAGE_TYPE_CONTENT |
drupal/ |
The type of language used to define the content language. | 7 | 1 |
| DRUPAL_PHP_FUNCTION_PATTERN |
drupal/ |
Regular expression to match PHP function names. | 7 | 1 |
| UPDATE_NOT_CURRENT |
drupal/ |
Project has a new release available, but it is not a security release. | 7 | 1 |
| UPDATE_UNKNOWN |
drupal/ |
No available update data was found for project. | 7 | 1 |
| BLOCK_REGION_NONE |
drupal/ |
Denotes that a block is not enabled in any region and should not be shown. | 7 | 1 |
| UNICODE_MULTIBYTE |
drupal/ |
Indicates that full unicode support with the PHP mbstring extension is being used. | 6 | 1 |
| REQUIREMENT_INFO |
drupal/ |
Requirement severity -- Informational message only. | 6 | 1 |
| FILE_MODIFY_PERMISSIONS |
drupal/ |
Flag used by file_prepare_directory() -- file permissions may be changed. | 6 | 1 |
| MENU_SITE_ONLINE |
drupal/ |
Internal menu status code -- Everything is working fine. | 6 | 1 |
| VERSION |
drupal/ |
The current system version. | 6 | 1 |
| LANGUAGE_RTL |
drupal/ |
Language written right to left. Possible value of $language->direction. | 6 | 1 |
| STREAM_WRAPPERS_WRITE_VISIBLE |
drupal/ |
Stream wrapper type flag -- visible, readable and writeable. | 6 | 1 |
| UPDATE_REVOKED |
drupal/ |
Current release has been unpublished and is no longer available. | 6 | 1 |
| UPDATE_NOT_SUPPORTED |
drupal/ |
Current release is no longer supported by the project maintainer. | 6 | 1 |
| UPDATE_NOT_CHECKED |
drupal/ |
Project's status cannot be checked. | 6 | 1 |
| FIELD_BEHAVIOR_DEFAULT |
drupal/ |
Value for field API concerning widget default and multiple value settings. | 6 | 1 |
| REGIONS_VISIBLE |
drupal/ |
Return only visible regions. | 6 | 1 |
| NODE_NOT_PUBLISHED |
drupal/ |
Node is not published. | 6 | 1 |
| NODE_PUBLISHED |
drupal/ |
Node is published. | 6 | 1 |
| USERNAME_MAX_LENGTH |
drupal/ |
Maximum length of username text field. | 6 | 1 |
| RDF_DEFAULT_BUNDLE |
drupal/ |
RDF bundle flag: Default bundle. | 6 | 1 |
| COMMENT_MODE_FLAT |
drupal/ |
Comments are displayed in a flat list - expanded. | 6 | 1 |
| FILE_EXIST |
drupal/ |
File permission check -- File exists. | 5 | 1 |
| FILE_WRITABLE |
drupal/ |
File permission check -- File is writable. | 5 | 1 |
| FILE_NOT_WRITABLE |
drupal/ |
File permission check -- File is not writable. | 5 | 1 |
| LOCALE_LANGUAGE_NEGOTIATION_URL |
drupal/ |
The language is determined using a URL language indicator: path prefix or domain according to the configuration. | 5 | 1 |
| LOCALE_LANGUAGE_NEGOTIATION_URL_DOMAIN |
drupal/ |
URL language negotiation: use the domain as URL language indicator. | 5 | 1 |
| DRUPAL_BOOTSTRAP_CONFIGURATION |
drupal/ |
First bootstrap phase: initialize configuration. | 5 | 1 |
| DRUPAL_BOOTSTRAP_VARIABLES |
drupal/ |
Fourth bootstrap phase: initialize the variable system. | 5 | 1 |
| UPDATE_CURRENT |
drupal/ |
Project is up to date. | 5 | 1 |
| UPDATE_NOT_FETCHED |
drupal/ |
There was a failure fetching available update data for this project. | 5 | 1 |
| UPDATE_FETCH_PENDING |
drupal/ |
We need to (re)fetch available update data for this project. | 5 | 1 |
| FIELD_BEHAVIOR_CUSTOM |
drupal/ |
Value for field API indicating a widget can receive several field values. | 5 | 1 |
| SHORTCUT_DEFAULT_SET_NAME |
drupal/ |
The name of the default shortcut set. | 5 | 1 |
| DRUPAL_REQUIRED |
drupal/ |
Required option on forms and settings | 5 | 1 |