Drupal的组成部分 9.常量

名称	位置	描述
BLOCK_CACHE_GLOBAL	modules/ block/ block.module	The block is the same for every user on every page where it is visible.
BLOCK_CACHE_PER_PAGE	modules/ block/ block.module	The block can change depending on the page being viewed.
BLOCK_CACHE_PER_ROLE	modules/ block/ block.module	The block can change depending on the roles the user viewing the page belongs to. This is the default setting, used when the block does not specify anything.
BLOCK_CACHE_PER_USER	modules/ block/ block.module	The block can change depending on the user viewing the page. This setting can be resource-consuming for sites with large number of users, and thus should only be used when BLOCK_CACHE_PER_ROLE is not sufficient.
BLOCK_NO_CACHE	modules/ block/ block.module	The block should not get cached. This setting should be used: for simple blocks (notably those that do not perform any db query), where querying the db cache would be more expensive than directly generating the content. for blocks that change too...
BLOCK_REGION_NONE	modules/ block/ block.module	Denotes that a block is not enabled in any region and should not be shown.
CACHE_AGGRESSIVE	includes/ bootstrap.inc	Indicates that page caching is using "aggressive" mode. This bypasses loading any modules for additional speed, which may break functionality in modules that expect to be run on each page load.
CACHE_DISABLED	includes/ bootstrap.inc	Indicates that page caching is disabled.
CACHE_NORMAL	includes/ bootstrap.inc	Indicates that page caching is enabled, using "normal" mode.
CACHE_PERMANENT	includes/ bootstrap.inc	Indicates that the item should never be removed unless explicitly told to using 7 }1 `1 F2 Z, r: i8 W; _ entries will be cleared from the cache_page and cache_block tables." href="http://www.drupaluser.org/api/function/cache_clear_all/7" style="color: rgb(0, 113, 179); text-decoration: none; ">cache_clear_all() with a cache ID.
CACHE_TEMPORARY	includes/ bootstrap.inc	Indicates that the item should be removed at the next general cache wipe.
CHECK_PLAIN	includes/ bootstrap.inc	Flag for drupal_set_title(); text is not sanitized, so run check_plain().
COMMENT_ANONYMOUS_MAYNOT_CONTACT	modules/ comment/ comment.module	Anonymous posters cannot enter their contact information.
COMMENT_ANONYMOUS_MAY_CONTACT	modules/ comment/ comment.module	Anonymous posters may leave their contact information.
COMMENT_ANONYMOUS_MUST_CONTACT	modules/ comment/ comment.module	Anonymous posters are required to leave their contact information.
COMMENT_FORM_BELOW	modules/ comment/ comment.module	Comment form should be shown below post or list of comments.
COMMENT_FORM_SEPARATE_PAGE	modules/ comment/ comment.module	Comment form should be displayed on a separate page.
COMMENT_MODE_FLAT_COLLAPSED	modules/ comment/ comment.module	Comments are displayed in a flat list - collapsed.
COMMENT_MODE_FLAT_EXPANDED	modules/ comment/ comment.module	Comments are displayed in a flat list - expanded.
COMMENT_MODE_THREADED_COLLAPSED	modules/ comment/ comment.module	Comments are displayed as a threaded list - collapsed.
COMMENT_MODE_THREADED_EXPANDED	modules/ comment/ comment.module	Comments are displayed as a threaded list - expanded.
COMMENT_NODE_DISABLED	modules/ comment/ comment.module	Comments for this node are disabled.
COMMENT_NODE_READ_ONLY	modules/ comment/ comment.module	Comments for this node are locked.
COMMENT_NODE_READ_WRITE	modules/ comment/ comment.module	Comments are enabled on this node.
COMMENT_NOT_PUBLISHED	modules/ comment/ comment.module	Comment is awaiting approval.
COMMENT_PREVIEW_OPTIONAL	modules/ comment/ comment.module	Comment preview is optional.
COMMENT_PREVIEW_REQUIRED	modules/ comment/ comment.module	Comment preview is required.
COMMENT_PUBLISHED	modules/ comment/ comment.module	Comment is published.
DRUPAL_ANONYMOUS_RID	includes/ bootstrap.inc	Role ID for anonymous users; should match what's in the "role" table.
DRUPAL_AUTHENTICATED_RID	includes/ bootstrap.inc	Role ID for authenticated users; should match what's in the "role" table.
DRUPAL_BOOTSTRAP_ACCESS	includes/ bootstrap.inc	Fourth bootstrap phase: identify and reject banned hosts.
DRUPAL_BOOTSTRAP_CONFIGURATION	includes/ bootstrap.inc	First bootstrap phase: initialize configuration.
DRUPAL_BOOTSTRAP_DATABASE	includes/ bootstrap.inc	Third bootstrap phase: initialize database layer.
DRUPAL_BOOTSTRAP_EARLY_PAGE_CACHE	includes/ bootstrap.inc	Second bootstrap phase: try to call a non-database cache fetch routine.
DRUPAL_BOOTSTRAP_FULL	includes/ bootstrap.inc	Final bootstrap phase: Drupal is fully loaded; validate and fix input data.
DRUPAL_BOOTSTRAP_LANGUAGE	includes/ bootstrap.inc	Eighth bootstrap phase: find out language of the page.
DRUPAL_BOOTSTRAP_LATE_PAGE_CACHE	includes/ bootstrap.inc	Seventh bootstrap phase: loadbootstrap.inc and module.inc, start the variable system and try to serve a page from the cache.
DRUPAL_BOOTSTRAP_PATH	includes/ bootstrap.inc	Nineth bootstrap phase: set $_GET['q'] to Drupal path of request.
DRUPAL_BOOTSTRAP_SESSION	includes/ bootstrap.inc	Fifth bootstrap phase: initialize session handling.
DRUPAL_BOOTSTRAP_VARIABLES	includes/ bootstrap.inc	Sixth bootstrap phase: initialize the variable system.
DRUPAL_CORE_COMPATIBILITY	modules/ system/ system.module	Core API compatibility.
DRUPAL_HASH_COUNT	includes/ password.inc	The standard log2 number of iterations for password stretching. This should increase by 1 at least every other Drupal version in order to counteract increases in the speed and power of computers available to crack the hashes.
DRUPAL_KILOBYTE	includes/ bootstrap.inc	The number of bytes in a kilobyte. The scientific standard for kilo is 1000, but used commonly in the field of computers to represent 1024 bits. For more information on the different standards please visit: http://en.wikipedia.org/wiki/Kilobyte.
DRUPAL_MAXIMUM_TEMP_FILE_AGE	modules/ system/ system.module	Maximum age of temporary files in seconds.
DRUPAL_MAX_HASH_COUNT	includes/ password.inc	The maximum allowed log2 number of iterations for password stretching.
DRUPAL_MINIMUM_MYSQL	modules/ system/ system.module	Minimum supported version of MySQL, if it is used.
DRUPAL_MINIMUM_PGSQL	modules/ system/ system.module	Minimum supported version of PostgreSQL, if it is used.
DRUPAL_MINIMUM_PHP	modules/ system/ system.module	Minimum supported version of PHP.
DRUPAL_MINIMUM_PHP_MEMORY_LIMIT	modules/ system/ system.module	Minimum recommended value of PHP memory_limit.
DRUPAL_MIN_HASH_COUNT	includes/ password.inc	The minimum allowed log2 number of iterations for password stretching.

名称	位置	描述
DRUPAL_ROOT	install.php	Root directory of Drupal installation.
DRUPAL_USER_TIMEZONE_DEFAULT	modules/ system/ system.module	New users will be set to the default time zone at registration.
DRUPAL_USER_TIMEZONE_EMPTY	modules/ system/ system.module	New users will get an empty time zone at registration.
DRUPAL_USER_TIMEZONE_SELECT	modules/ system/ system.module	New users will select their own timezone at registration.
EMAIL_MAX_LENGTH	modules/ user/ user.module	Maximum length of user e-mail text field.
FILE_CREATE_DIRECTORY	includes/ file.inc	Flag used by file_check_directory() -- create directory if not present.
FILE_DOWNLOADS_PRIVATE	includes/ file.inc	Flag to indicate that the 'private' file download method is enabled.
FILE_DOWNLOADS_PUBLIC	includes/ file.inc	Flag to indicate that the 'public' file download method is enabled.
FILE_EXECUTABLE	includes/ install.inc	File permission check -- File is executable.
FILE_EXIST	includes/ install.inc	File permission check -- File exists.
FILE_EXISTS_ERROR	includes/ file.inc	Flag for dealing with existing files: Do nothing and return FALSE.
FILE_EXISTS_RENAME	includes/ file.inc	Flag for dealing with existing files: Appends number until name is unique.
FILE_EXISTS_REPLACE	includes/ file.inc	Flag for dealing with existing files: Replace the existing file.
FILE_MODIFY_PERMISSIONS	includes/ file.inc	Flag used by file_check_directory() -- file permissions may be changed.
FILE_NOT_EXECUTABLE	includes/ install.inc	File permission check -- File is not executable.
FILE_NOT_EXIST	includes/ install.inc	File permission check -- File does not exist.
FILE_NOT_READABLE	includes/ install.inc	File permission check -- File is not readable.
FILE_NOT_WRITABLE	includes/ install.inc	File permission check -- File is not writable.
FILE_READABLE	includes/ install.inc	File permission check -- File is readable.
FILE_STATUS_PERMANENT	includes/ file.inc	File status -- This bit in the status indicates that the file is permanent and should not be deleted during file garbage collection process. Temporary files older than DRUPAL_MAXIMUM_TEMP_FILE_AGE will be removed during cron runs.
FILE_WRITABLE	includes/ install.inc	File permission check -- File is writable.
FILTER_FORMAT_DEFAULT	modules/ filter/ filter.module	Special format ID which means "use the default format".
JS_DEFAULT	includes/ common.inc	The default weight of JavaScript being added to the page.
JS_LIBRARY	includes/ common.inc	The weight of JavaScript libraries, settings or jQuery plugins being added to the page.
JS_THEME	includes/ common.inc	The weight of theme JavaScript code being added to the page.
LANGUAGE_LTR	modules/ locale/ locale.module	Language written left to right. Possible value of $language->direction.
LANGUAGE_NEGOTIATION_DOMAIN	includes/ bootstrap.inc	Domain based negotiation with fallback to default language if no language identified by domain.
LANGUAGE_NEGOTIATION_NONE	includes/ bootstrap.inc	No language negotiation. The default language is used.
LANGUAGE_NEGOTIATION_PATH	includes/ bootstrap.inc	Path based negotiation with fallback to user preferences and browser language detection if no defined path prefix identified.
LANGUAGE_NEGOTIATION_PATH_DEFAULT	includes/ bootstrap.inc	Path based negotiation with fallback to default language if no defined path prefix identified.
LANGUAGE_RTL	modules/ locale/ locale.module	Language written right to left. Possible value of $language->direction.
LOCALE_IMPORT_KEEP	includes/ locale.inc	Translation import mode keeping existing translations and only inserting new strings.
LOCALE_IMPORT_OVERWRITE	includes/ locale.inc	Translation import mode overwriting all existing translations if new translated version available.
LOCALE_JS_STRING	includes/ locale.inc	Regular expression pattern used to localize JavaScript strings.
MAINTENANCE_MODE	install.php	Global flag to indicate that site is in installation mode.
MARK_NEW	includes/ theme.inc	Mark content as being new.
MARK_READ	includes/ theme.inc	Mark content as read.
MARK_UPDATED	includes/ theme.inc	Mark content as being updated.
MENU_ACCESS_DENIED	includes/ menu.inc	Internal menu status code -- Menu item access is denied.
MENU_CALLBACK	includes/ menu.inc	Menu type -- A hidden, internal callback, typically used for API calls.
MENU_CREATED_BY_ADMIN	includes/ menu.inc	Internal menu flag -- menu item was created by administrator.
MENU_DEFAULT_LOCAL_TASK	includes/ menu.inc	Menu type -- The "default" local task, which is initially active.
MENU_FOUND	includes/ menu.inc	Internal menu status code -- Menu item was found.
MENU_IS_LOCAL_TASK	includes/ menu.inc	Internal menu flag -- menu item is a local task.
MENU_IS_ROOT	includes/ menu.inc	Internal menu flag -- menu item is the root of the menu tree.
MENU_LINKS_TO_PARENT	includes/ menu.inc	Internal menu flag -- menu item links back to its parnet.
MENU_LOCAL_TASK	includes/ menu.inc	Menu type -- A task specific to the parent item, usually rendered as a tab.
MENU_MAX_DEPTH	includes/ menu.inc	The maximum depth of a menu links tree - matches the number of p columns.
MENU_MAX_MENU_NAME_LENGTH_UI	modules/ menu/ menu.module	Maximum length of menu name as entered by the user. Database length is 32 and we add a menu- prefix.
MENU_MAX_PARTS	includes/ menu.inc	The maximum number of path elements for a menu callback

名称	位置	描述
MENU_MODIFIED_BY_ADMIN	includes/ menu.inc	Internal menu flag -- menu item can be modified by administrator.
MENU_NORMAL_ITEM	includes/ menu.inc	Menu type -- A "normal" menu item that's shown in menu and breadcrumbs.
MENU_NOT_FOUND	includes/ menu.inc	Internal menu status code -- Menu item was not found.
MENU_SITE_OFFLINE	includes/ menu.inc	Internal menu status code -- Menu item inaccessible because site is offline.
MENU_SUGGESTED_ITEM	includes/ menu.inc	Menu type -- A normal menu item, hidden until enabled by an administrator.
MENU_VISIBLE_IN_BREADCRUMB	includes/ menu.inc	Internal menu flag -- menu item is visible in the breadcrumb.
MENU_VISIBLE_IN_TREE	includes/ menu.inc	Internal menu flag -- menu item is visible in the menu tree.
MODULE_IMPLEMENTS_CLEAR_CACHE	includes/ module.inc	Pass this to module_implements when its cache needs to be cleared.
MODULE_IMPLEMENTS_WRITE_CACHE	includes/ module.inc	Pass this to module_implements when its cache needs to be written.
NODE_BUILD_NORMAL	modules/ node/ node.module	Node is being built before being viewed normally.
NODE_BUILD_PREVIEW	modules/ node/ node.module	Node is being built before being previewed.
NODE_BUILD_PRINT	modules/ node/ node.module	Node is being built before being printed.
NODE_BUILD_RSS	modules/ node/ node.module	Node is being built before being displayed as part of an RSS feed.
NODE_BUILD_SEARCH_INDEX	modules/ node/ node.module	Node is being built before being indexed by search module.
NODE_BUILD_SEARCH_RESULT	modules/ node/ node.module	Node is being built before being displayed as a search result.
NODE_NEW_LIMIT	modules/ node/ node.module	Nodes changed before this time are always marked as read.
OPENID_DH_DEFAULT_GEN	modules/ openid/ openid.inc	Diffie-Hellman generator; used for Diffie-Hellman key exchange computations.
OPENID_DH_DEFAULT_MOD	modules/ openid/ openid.inc	Diffie-Hellman Key Exchange Default Value.
OPENID_NS_1_0	modules/ openid/ openid.inc	OpenID Authentication 1.0 namespace URL; used for backwards-compatibility.
OPENID_NS_1_1	modules/ openid/ openid.inc	OpenID Authentication 1.1 namespace URL; used for backwards-compatibility.
OPENID_NS_2_0	modules/ openid/ openid.inc	OpenID Authentication 2.0 namespace URL.
OPENID_RAND_SOURCE	modules/ openid/ openid.inc	Random number generator; used for Diffie-Hellman key exchange computations.
OPENID_SHA1_BLOCKSIZE	modules/ openid/ openid.inc	SHA-1 hash block size; used for Diffie-Hellman key exchange computations.
PASS_THROUGH	includes/ bootstrap.inc	Flag for drupal_set_title(); text has already been sanitized.
PREG_CLASS_CJK	modules/ search/ search.module	Matches all CJK characters that are candidates for auto-splitting (Chinese, Japanese, Korean). Contains kana and BMP ideographs.
PREG_CLASS_NUMBERS	modules/ search/ search.module	Matches all 'N' Unicode character classes (numbers)
PREG_CLASS_PUNCTUATION	modules/ search/ search.module	Matches all 'P' Unicode character classes (punctuation)
PREG_CLASS_SEARCH_EXCLUDE	modules/ search/ search.module	Matches Unicode character classes to exclude from the search index.
PROFILE_HIDDEN	modules/ profile/ profile.module	Hidden profile field, only accessible by administrators, modules and themes.
PROFILE_PRIVATE	modules/ profile/ profile.module	Private field, content only available to privileged users.
PROFILE_PUBLIC	modules/ profile/ profile.module	Public field, content shown on profile page but not used on member list pages.
PROFILE_PUBLIC_LISTINGS	modules/ profile/ profile.module	Public field, content shown on profile page and on member list pages.
REGISTRY_RESET_LOOKUP_CACHE	includes/ bootstrap.inc	Signals that the registry lookup cache should be reset.
REGISTRY_WRITE_LOOKUP_CACHE	includes/ bootstrap.inc	Signals that the registry lookup cache should be written to storage.
REQUEST_TIME	includes/ bootstrap.inc	For convenience, define a short form of the request time global.
REQUIREMENT_ERROR	includes/ install.inc	Requirement severity -- Error condition; abort installation.
REQUIREMENT_INFO	includes/ install.inc	Requirement severity -- Informational message only.
REQUIREMENT_OK	includes/ install.inc	Requirement severity -- Requirement successfully met.
REQUIREMENT_WARNING	includes/ install.inc	Requirement severity -- Warning condition; proceed but flag warning.
SAVED_DELETED	includes/ common.inc	Return status for saving which deleted an existing item.
SAVED_NEW	includes/ common.inc	Return status for saving which involved creating a new item.
SAVED_UPDATED	includes/ common.inc	Return status for saving which involved an update to an existing item.
SCHEMA_INSTALLED	includes/ install.inc	Indicates that a module has been installed.
SCHEMA_UNINSTALLED	includes/ install.inc	Indicates that a module has not been installed yet.
TRANSLATION_ENABLED	modules/ translation/ translation.module	Identifies a content type which has translation support enabled.
UNICODE_ERROR	includes/ unicode.inc	Indicates an error during check for PHP unicode support.
UNICODE_MULTIBYTE	includes/ unicode.inc	Indicates that full unicode support with the PHP mbstring extension is being used.
UNICODE_SINGLEBYTE	includes/ unicode.inc	Indicates that standard PHP (emulated) unicode support is being used.
UPDATE_CURRENT	modules/ update/ update.module	Project is up to date.
UPDATE_DEFAULT_URL	modules/ update/ update.module	URL to check for updates, if a given project doesn't define its own.

名称	位置	描述
UPDATE_NOT_CHECKED	modules/ update/ update.module	Project's status cannot be checked.
UPDATE_NOT_CURRENT	modules/ update/ update.module	Project has a new release available, but it is not a security release.
UPDATE_NOT_SECURE	modules/ update/ update.module	Project is missing security update(s).
UPDATE_NOT_SUPPORTED	modules/ update/ update.module	Current release is no longer supported by the project maintainer.
UPDATE_REVOKED	modules/ update/ update.module	Current release has been unpublished and is no longer available.
UPDATE_UNKNOWN	modules/ update/ update.module	No available update data was found for project.
USERNAME_MAX_LENGTH	modules/ user/ user.module	Maximum length of username text field.
VERSION	modules/ system/ system.module	The current system version.
WATCHDOG_ALERT	includes/ bootstrap.inc	Log message severity -- Alert: action must be taken immediately. See alsowatchdog()
WATCHDOG_CRITICAL	includes/ bootstrap.inc	Log message severity -- Critical: critical conditions. See alsowatchdog()
WATCHDOG_DEBUG	includes/ bootstrap.inc	Log message severity -- Debug: debug-level messages. See alsowatchdog()
WATCHDOG_EMERG	includes/ bootstrap.inc	Log message severity -- Emergency: system is unusable. See alsowatchdog()
WATCHDOG_ERROR	includes/ bootstrap.inc	Log message severity -- Error: error conditions. See alsowatchdog()
WATCHDOG_INFO	includes/ bootstrap.inc	Log message severity -- Informational: informational messages. See alsowatchdog()
WATCHDOG_NOTICE	includes/ bootstrap.inc	Log message severity -- Notice: normal but significant condition. See alsowatchdog()
WATCHDOG_WARNING	includes/ bootstrap.inc	Log message severity -- Warning: warning conditions. See alsowatchdog()