NameLocationDescription
BLOCK_CACHE_GLOBALmodules/block/block.moduleThe block is the same for every user on every page where it is visible.
BLOCK_CACHE_PER_PAGEmodules/block/block.moduleThe block can change depending on the page being viewed.
BLOCK_CACHE_PER_ROLEmodules/block/block.moduleThe 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_USERmodules/block/block.moduleThe 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_CACHEmodules/block/block.moduleThe block should not get cached. This setting should be used:
BLOCK_REGION_NONEmodules/block/block.moduleDenotes that a block is not enabled in any region and should not be shown.
CACHE_AGGRESSIVEincludes/bootstrap.incIndicates 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_DISABLEDincludes/bootstrap.incIndicates that page caching is disabled.
CACHE_NORMALincludes/bootstrap.incIndicates that page caching is enabled, using "normal" mode.
CACHE_PERMANENTincludes/bootstrap.incIndicates that the item should never be removed unless explicitly told to using cache_clear_all() with a cache ID.
CACHE_TEMPORARYincludes/bootstrap.incIndicates that the item should be removed at the next general cache wipe.
COMMENT_ANONYMOUS_MAYNOT_CONTACTmodules/comment/comment.moduleAnonymous posters may not enter their contact information.
COMMENT_ANONYMOUS_MAY_CONTACTmodules/comment/comment.moduleAnonymous posters may leave their contact information.
COMMENT_ANONYMOUS_MUST_CONTACTmodules/comment/comment.moduleAnonymous posters must leave their contact information.
COMMENT_CONTROLS_ABOVEmodules/comment/comment.moduleComment controls should be shown above the comment list.
COMMENT_CONTROLS_ABOVE_BELOWmodules/comment/comment.moduleComment controls should be shown both above and below the comment list.
COMMENT_CONTROLS_BELOWmodules/comment/comment.moduleComment controls should be shown below the comment list.
COMMENT_CONTROLS_HIDDENmodules/comment/comment.moduleComment controls are hidden.
COMMENT_FORM_BELOWmodules/comment/comment.moduleComment form should be shown below post or list of comments.
COMMENT_FORM_SEPARATE_PAGEmodules/comment/comment.moduleComment form should be displayed on a separate page.
COMMENT_MODE_FLAT_COLLAPSEDmodules/comment/comment.moduleComments are displayed in a flat list - collapsed.
COMMENT_MODE_FLAT_EXPANDEDmodules/comment/comment.moduleComments are displayed in a flat list - expanded.
COMMENT_MODE_THREADED_COLLAPSEDmodules/comment/comment.moduleComments are displayed as a threaded list - collapsed.
COMMENT_MODE_THREADED_EXPANDEDmodules/comment/comment.moduleComments are displayed as a threaded list - expanded.
COMMENT_NODE_DISABLEDmodules/comment/comment.moduleComments for this node are disabled.
COMMENT_NODE_READ_ONLYmodules/comment/comment.moduleComments for this node are locked.
COMMENT_NODE_READ_WRITEmodules/comment/comment.moduleComments are enabled on this node.
COMMENT_NOT_PUBLISHEDmodules/comment/comment.moduleComment is awaiting approval.
COMMENT_ORDER_NEWEST_FIRSTmodules/comment/comment.moduleComments are ordered by date - newest first.
COMMENT_ORDER_OLDEST_FIRSTmodules/comment/comment.moduleComments are ordered by date - oldest first.
COMMENT_PREVIEW_OPTIONALmodules/comment/comment.moduleComment preview is optional.
COMMENT_PREVIEW_REQUIREDmodules/comment/comment.moduleComment preview is required.
COMMENT_PUBLISHEDmodules/comment/comment.moduleComment is published.
DB_ERRORincludes/database.incA hash value to check when outputting database errors, md5('DB_ERROR').
DB_QUERY_REGEXPincludes/database.incIndicates the place holders that should be replaced in _db_query_callback().
DRUPAL_ANONYMOUS_RIDincludes/bootstrap.incRole ID for anonymous users; should match what's in the "role" table.
DRUPAL_AUTHENTICATED_RIDincludes/bootstrap.incRole ID for authenticated users; should match what's in the "role" table.
DRUPAL_BOOTSTRAP_ACCESSincludes/bootstrap.incFourth bootstrap phase: identify and reject banned hosts.
DRUPAL_BOOTSTRAP_CONFIGURATIONincludes/bootstrap.incFirst bootstrap phase: initialize configuration.
DRUPAL_BOOTSTRAP_DATABASEincludes/bootstrap.incThird bootstrap phase: initialize database layer.
DRUPAL_BOOTSTRAP_EARLY_PAGE_CACHEincludes/bootstrap.incSecond bootstrap phase: try to call a non-database cache fetch routine.
DRUPAL_BOOTSTRAP_FULLincludes/bootstrap.incFinal bootstrap phase: Drupal is fully loaded; validate and fix input data.
DRUPAL_BOOTSTRAP_LANGUAGEincludes/bootstrap.incSeventh bootstrap phase: find out language of the page.
DRUPAL_BOOTSTRAP_LATE_PAGE_CACHEincludes/bootstrap.incSixth bootstrap phase: load bootstrap.inc and module.inc, start the variable system and try to serve a page from the cache.
DRUPAL_BOOTSTRAP_PATHincludes/bootstrap.incEighth bootstrap phase: set $_GET['q'] to Drupal path of request.
DRUPAL_BOOTSTRAP_SESSIONincludes/bootstrap.incFifth bootstrap phase: initialize session handling.
DRUPAL_CORE_COMPATIBILITYmodules/system/system.moduleCore API compatibility.
DRUPAL_MAXIMUM_TEMP_FILE_AGEmodules/system/system.moduleMaximum age of temporary files in seconds.
DRUPAL_MINIMUM_MYSQLmodules/system/system.moduleMinimum supported version of MySQL, if it is used.
DRUPAL_MINIMUM_PGSQLmodules/system/system.moduleMinimum supported version of PostgreSQL, if it is used.