Documentation & API reference
Constants
Primary tabs
| Name | Location | Description |
Direct uses |
Strings |
|---|---|---|---|---|
| EMAIL_MAX_LENGTH |
drupal/ |
Maximum length of user e-mail text field. | 3 | 1 |
| BLOCK_VISIBILITY_LISTED |
drupal/ |
Shows this block on only the listed pages. | 3 | 1 |
| IMAGE_STORAGE_NORMAL |
drupal/ |
Image style constant for user presets in the database. | 3 | 1 |
| IMAGE_STORAGE_OVERRIDE |
drupal/ |
Image style constant for user presets that override module-defined presets. | 3 | 1 |
| IMAGE_STORAGE_DEFAULT |
drupal/ |
Image style constant for module-defined presets in code. | 3 | 1 |
| FILE_URL_TEST_CDN_2 |
drupal/ |
3 | 1 | |
| DRUPAL_MAX_HASH_COUNT |
drupal/ |
The maximum allowed log2 number of iterations for password stretching. | 2 | 1 |
| DRUPAL_HASH_LENGTH |
drupal/ |
The expected (and maximum) number of characters in a hashed password. | 2 | 1 |
| LOCALE_LANGUAGE_NEGOTIATION_BROWSER |
drupal/ |
The language is set based on the browser language settings. | 2 | 1 |
| LOCALE_LANGUAGE_NEGOTIATION_INTERFACE |
drupal/ |
The language is determined using the current interface language. | 2 | 1 |
| MARK_READ |
drupal/ |
Mark content as read. | 2 | 1 |
| MARK_UPDATED |
drupal/ |
Mark content as being updated. | 2 | 1 |
| SAVED_DELETED |
drupal/ |
Return status for saving which deleted an existing item. | 2 | 1 |
| CSS_SYSTEM |
drupal/ |
The default group for system CSS files added to the page. | 2 | 1 |
| CSS_DEFAULT |
drupal/ |
The default group for module CSS files added to the page. | 2 | 1 |
| JS_DEFAULT |
drupal/ |
The default group for module JavaScript code added to the page. | 2 | 1 |
| JS_THEME |
drupal/ |
The default group for theme JavaScript code added to the page. | 2 | 1 |
| HTTP_REQUEST_TIMEOUT |
drupal/ |
Error code indicating that the request exceeded the specified timeout. | 2 | 1 |
| DRUPAL_CACHE_CUSTOM |
drupal/ |
The block is handling its own caching in its hook_block_view(). | 2 | 1 |
| DRUPAL_CACHE_PER_USER |
drupal/ |
The block or element can change depending on the user. | 2 | 1 |
| MENU_VISIBLE_IN_TREE |
drupal/ |
Internal menu flag -- menu item is visible in the menu tree. | 2 | 1 |
| MENU_CONTEXT_NONE |
drupal/ |
Internal menu flag: Invisible local task. | 2 | 1 |
| INSTALL_TASK_RUN_IF_REACHED |
drupal/ |
Run the task on each installation request until the database is set up. | 2 | 1 |
| ERROR_REPORTING_DISPLAY_SOME |
drupal/ |
Error reporting level: display errors and warnings. | 2 | 1 |
| CACHE_PERMANENT |
drupal/ |
Indicates that the item should never be removed unless explicitly selected. | 2 | 1 |
| WATCHDOG_EMERGENCY |
drupal/ |
Log message severity -- Emergency: system is unusable. | 2 | 1 |
| WATCHDOG_ALERT |
drupal/ |
Log message severity -- Alert: action must be taken immediately. | 2 | 1 |
| WATCHDOG_CRITICAL |
drupal/ |
Log message severity -- Critical conditions. | 2 | 1 |
| DRUPAL_BOOTSTRAP_LANGUAGE |
drupal/ |
Seventh bootstrap phase: find out language of the page. | 2 | 1 |
| REGISTRY_RESET_LOOKUP_CACHE |
drupal/ |
Signals that the registry lookup cache should be reset. | 2 | 1 |
| REGISTRY_WRITE_LOOKUP_CACHE |
drupal/ |
Signals that the registry lookup cache should be written to storage. | 2 | 1 |
| STREAM_WRAPPERS_LOCAL_HIDDEN |
drupal/ |
Stream wrapper type flag -- hidden, readable and writeable using local files. | 2 | 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… | 2 | 1 |
| STREAM_WRAPPERS_LOCAL_NORMAL |
drupal/ |
Stream wrapper type flag -- visible, readable and writeable using local files. | 2 | 1 |
| FIELD_BEHAVIOR_NONE |
drupal/ |
Value for field API indicating a widget doesn't accept default values. | 2 | 1 |
| 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 | 1 |
| DRUPAL_CRON_DEFAULT_THRESHOLD |
drupal/ |
Default interval for automatic cron executions in seconds. | 2 | 1 |
| DRUPAL_USER_TIMEZONE_DEFAULT |
drupal/ |
New users will be set to the default time zone at registration. | 2 | 1 |
| OPENID_DH_DEFAULT_MOD |
drupal/ |
Diffie-Hellman Key Exchange Default Value. | 2 | 1 |
| OPENID_DH_DEFAULT_GEN |
drupal/ |
Diffie-Hellman generator; used for Diffie-Hellman key exchange computations. | 2 | 1 |
| PROFILE_PUBLIC_LISTINGS |
drupal/ |
Public field, content shown on profile page and on member list pages. | 2 | 1 |
| NODE_ACCESS_IGNORE |
drupal/ |
Modules should return this value from hook_node_access() to not affect node access. | 2 | 1 |
| COMMENT_ANONYMOUS_MAYNOT_CONTACT |
drupal/ |
Anonymous posters cannot enter their contact information. | 2 | 1 |
| COMMENT_ANONYMOUS_MAY_CONTACT |
drupal/ |
Anonymous posters may leave their contact information. | 2 | 1 |
| BLOCK_CUSTOM_FIXED |
drupal/ |
Users cannot control whether or not they see this block. | 2 | 1 |
| BLOCK_CUSTOM_ENABLED |
drupal/ |
Shows this block by default, but lets individual users hide it. | 2 | 1 |
| BLOCK_VISIBILITY_PHP |
drupal/ |
Shows this block if the associated PHP code returns TRUE. | 2 | 1 |
| IMAGE_STORAGE_EDITABLE |
drupal/ |
Image style constant to represent an editable preset. | 2 | 1 |
| FILE_URL_TEST_CDN_1 |
drupal/ |
@file Helper module for the file tests. | 2 | 1 |