Drupal e-Commerce

Allow modules to interact with the Drupal core.

Drupal's module system is based on the concept of "hooks". A hook is a PHP function that is named foo_bar(), where "foo" is the name of the module (whose filename is thus foo.module) and "bar" is the name of the hook. Each hook has a defined set of parameters and a specified result type.

To extend Drupal, a module need simply implement a hook. When Drupal wishes to allow intervention from modules, it determines which modules implement a hook and call that hook in all enabled modules that implement it.

The available hooks to implement are explained here in the Hooks section of the developer documentation. The string "hook" is used as a placeholder for the module name is the hook definitions. For example, if the module file is called example.module, then hook_help() as implemented by that module would be defined as example_help().

Functions

Name	Location	Description
hook_block	docs-4-6/hooks/core.php	Declare a block or set of blocks.
hook_comment	docs-4-6/hooks/core.php	Act on comment modification.
hook_cron	docs-4-6/hooks/core.php	Perform periodic actions.
hook_db_rewrite_sql	docs-4-6/hooks/core.php	Add JOIN and WHERE statements to queries and decide whether the primary_field shall be made DISTINCT. For node objects, primary field is always called nid. For taxonomy terms, it is tid and for vocabularies it is vid. For comments, it is cid. Note...
hook_exit	docs-4-6/hooks/core.php	Perform cleanup tasks.
hook_filter	docs-4-6/hooks/core.php	Define content filters.
hook_filter_tips	docs-4-6/hooks/core.php	Provide tips for using filters.
hook_footer	docs-4-6/hooks/core.php	Insert closing HTML.
hook_help	docs-4-6/hooks/core.php	Provide online user help.
hook_init	docs-4-6/hooks/core.php	Perform setup tasks.
hook_link	docs-4-6/hooks/core.php	Define internal Drupal links.
hook_menu	docs-4-6/hooks/core.php	Define menu items and page callbacks.
hook_nodeapi	docs-4-6/hooks/core.php	Act on nodes defined by other modules.
hook_node_grants	docs-4-6/hooks/core.php	Grant access to nodes.
hook_onload	docs-4-6/hooks/core.php	Insert a JavaScript onload handler.
hook_perm	docs-4-6/hooks/core.php	Define user permissions.
hook_ping	docs-4-6/hooks/core.php	Ping another server.
hook_search	docs-4-6/hooks/core.php	Define a custom search routine.
hook_search_item	docs-4-6/hooks/core.php	Format a search result.
hook_search_preprocess	docs-4-6/hooks/core.php	Preprocess text for the search index.
hook_settings	docs-4-6/hooks/core.php	Declare administrative settings for a module.
hook_taxonomy	docs-4-6/hooks/core.php	Act on taxonomy changes.
hook_textarea	docs-4-6/hooks/core.php	React to textarea additions.
hook_update_index	docs-4-6/hooks/core.php	Update Drupal's full-text index for this module.
hook_user	docs-4-6/hooks/core.php	Act on user account actions.
hook_xmlrpc	docs-4-6/hooks/core.php	Register XML-RPC callbacks.