Documentation & API reference
Constants
Primary tabs
| Name | Location | Description |
Direct uses |
Strings |
|---|---|---|---|---|
| DRUPAL_CACHE_PER_USER |
drupal/ |
The block or element can change depending on the user. | 2 | |
| MENU_SIBLING_LOCAL_TASK |
drupal/ |
Menu type -- A task specific to the parent, which is never rendered. | 2 | 1 |
| MENU_CONTEXT_NONE |
drupal/ |
Internal menu flag: Invisible local task. | 2 | |
| MENU_NOT_FOUND |
drupal/ |
Internal menu status code -- Menu item was not found. | 2 | |
| INSTALL_TASK_RUN_IF_REACHED |
drupal/ |
Run the task on each installation request that reaches it. | 2 | |
| ERROR_REPORTING_DISPLAY_ALL |
drupal/ |
Error reporting level: display all messages. | 2 | |
| ERROR_REPORTING_DISPLAY_VERBOSE |
drupal/ |
Error reporting level: display all messages, plus backtrace information. | 2 | |
| WATCHDOG_DEBUG |
drupal/ |
Log message severity -- Debug-level messages. | 2 | |
| PREG_CLASS_CJK |
drupal/ |
Matches CJK (Chinese, Japanese, Korean) letter-like characters. | 2 | 1 |
| DRUPAL_MAXIMUM_TEMP_FILE_AGE |
drupal/ |
Maximum age of temporary files in seconds. | 2 | |
| NODE_NOT_PROMOTED |
drupal/ |
Denotes that the node is not promoted to the front page. | 2 | |
| NODE_STICKY |
drupal/ |
Denotes that the node is sticky at the top of the page. | 2 | |
| NODE_ACCESS_ALLOW |
drupal/ |
Denotes that access is allowed for a node. | 2 | |
| NODE_ACCESS_DENY |
drupal/ |
Denotes that access is denied for a node. | 2 | |
| EMAIL_MAX_LENGTH |
drupal/ |
Maximum length of user e-mail text field. | 2 | 1 |
| LOCALE_TRANSLATION_DOWNLOADED |
drupal/ |
Translation source is a downloaded file. | 2 | |
| FILTER_TYPE_MARKUP_LANGUAGE |
drupal/ |
Non-HTML markup language filters that generate HTML. | 2 | |
| FILTER_TYPE_TRANSFORM_REVERSIBLE |
drupal/ |
Reversible transformation filters. | 2 | |
| FILTER_TYPE_TRANSFORM_IRREVERSIBLE |
drupal/ |
Irreversible transformation filters. | 2 | |
| COMMENT_ANONYMOUS_MAYNOT_CONTACT |
drupal/ |
Anonymous posters cannot enter their contact information. | 2 | |
| COMMENT_ANONYMOUS_MAY_CONTACT |
drupal/ |
Anonymous posters may leave their contact information. | 2 | |
| BLOCK_VISIBILITY_LISTED |
drupal/ |
Shows this block on only the listed pages. | 2 | |
| BLOCK_VISIBILITY_PHP |
drupal/ |
Shows this block if the associated PHP code returns TRUE. | 2 | |
| FILE_URL_TEST_CDN_1 |
drupal/ |
2 | ||
| ENTITY_TEST_TYPES_REVISABLE |
drupal/ |
Filter that limits test entity list to revisable ones. | 2 | |
| ENTITY_TEST_TYPES_MULTILINGUAL |
drupal/ |
Filter that limits test entity list to multilingual ones. | 2 | |
| LANGUAGE_NEGOTIATION_INTERFACE |
drupal/ |
The language is determined using the current interface language. | 2 | |
| VIEWS_HANDLER_RENDER_TEXT_PHASE_EMPTY |
drupal/ |
Indicator of the renderText() method for rendering the empty text. | 2 | 1 |
| FILE_NOT_EXIST |
drupal/ |
File permission check -- File does not exist. | 1 | |
| REQUIRED_D7_SCHEMA_VERSION |
drupal/ |
Minimum schema version of Drupal 7 required for upgrade to Drupal 8. | 1 | |
| STREAM_WRAPPERS_READ |
drupal/ |
Stream wrapper bit flag -- wrapper is readable (almost always true). | 1 | |
| STREAM_WRAPPERS_WRITE |
drupal/ |
Stream wrapper bit flag -- wrapper is writeable. | 1 | |
| STREAM_WRAPPERS_VISIBLE |
drupal/ |
Stream wrapper bit flag -- exposed in the UI and potentially web accessible. | 1 | |
| STREAM_WRAPPERS_HIDDEN |
drupal/ |
Stream wrapper type flag -- not visible in the UI or accessible via web, but readable and writable. E.g. the temporary directory for uploads. | 1 | 1 |
| STREAM_WRAPPERS_READ_VISIBLE |
drupal/ |
Stream wrapper type flag -- visible and read-only. | 1 | 1 |
| STREAM_WRAPPERS_NORMAL |
drupal/ |
Stream wrapper type flag -- the default when 'type' is omitted from hook_stream_wrappers(). This does not include STREAM_WRAPPERS_LOCAL, because PHP grants a greater trust level to local files (for example, they can be used in an… | 1 | 1 |
| CSS_COMPONENT |
drupal/ |
The default weight for CSS rules that style design components (and their associated states and skins.) | 1 | |
| CSS_SKIN |
drupal/ |
The default weight for CSS rules that style skins and are not included with components. | 1 | |
| JS_SETTING |
drupal/ |
The default group for JavaScript settings added to the page. | 1 | |
| DRUPAL_CACHE_GLOBAL |
drupal/ |
The block or element is the same for every user and page that it is visible. | 1 | |
| MENU_IS_LOCAL_ACTION |
drupal/ |
Internal menu flag -- menu item is a local action. | 1 | |
| MENU_ACCESS_DENIED |
drupal/ |
Internal menu status code -- Menu item access is denied. | 1 | |
| MENU_PREFERRED_LINK |
drupal/ |
Reserved key to identify the most specific menu link for a given path. | 1 | |
| DRUPAL_MINIMUM_PHP_MEMORY_LIMIT |
drupal/ |
Minimum recommended value of PHP memory_limit. | 1 | |
| ERROR_REPORTING_DISPLAY_SOME |
drupal/ |
Error reporting level: display errors and warnings. | 1 | |
| WATCHDOG_EMERGENCY |
drupal/ |
Log message severity -- Emergency: system is unusable. | 1 | |
| WATCHDOG_ALERT |
drupal/ |
Log message severity -- Alert: action must be taken immediately. | 1 | |
| DRUPAL_BOOTSTRAP_KERNEL |
drupal/ |
Second bootstrap phase, initalize a kernel. | 1 | |
| DRUPAL_BOOTSTRAP_PAGE_CACHE |
drupal/ |
Third bootstrap phase: try to serve a cached page. | 1 | |
| CHECK_PLAIN |
drupal/ |
Flag for drupal_set_title(); text is not sanitized, so run check_plain(). | 1 |