Implementation of hooks in Drupal
In your directory /sites/all/, you have to create 2 sub-directories called “themes” and “modules” where your custom themes and modules are located.
What “hooks” in Drupal is all about? They allow your custom-built modules to interact with the Drupal core. A hook is a function that is named foo_hookname(), where “foo” is the name of your custom-built module (whose filename is foo.module) and “hookname” is the name of the hook. Each hook has a defined set of parameters and a specified result type.
To extend Drupal system, your custom-built module needs to simply implement a hook. When Drupal wishes to allow intervention from modules, it determines which modules implement a hook and calls that hook in all enabled modules that implement it.
In Drupal 6.x there’re more than 70 hooks that you got to remember in case your internet is down. My next posts will show you how to implement each of these hooks in your custom modules.
hook_access hook_actions_delete hook_action_info hook_action_info_alter hook_block hook_boot hook_comment hook_cron hook_db_rewrite_sql hook_delete hook_disable hook_elements hook_enable hook_exit hook_file_download hook_filter hook_filter_tips hook_flush_caches hook_footer hook_form hook_forms hook_form_alter hook_form_FORM_ID_alter hook_help hook_hook_info |
hook_inithook_insert hook_install hook_link hook_link_alter hook_load hook_locale hook_mail hook_mail_alter hook_menu hook_menu_alter hook_menu_link_alter hook_nodeapi hook_node_access_records hook_node_grants hook_node_info hook_node_operations hook_node_type hook_perm hook_ping hook_prepare hook_profile_alter hook_requirements hook_schema hook_schema_alter hook_search |
hook_search_preprocess hook_system_info_alter hook_taxonomy hook_term_path hook_theme hook_theme_registry_alter hook_translated_menu_link_alter hook_translation_link_alter hook_uninstall hook_update hook_update_index hook_update_last_removed hook_update_N hook_update_projects_alter hook_update_status_alter hook_user hook_user_operations hook_validate hook_view hook_watchdog hook_xmlrpc module_hook module_implements module_invoke module_invoke_all |