Drupal的组成部分 6.搜索系统

he Drupal search interface manages a global search mechanism.

Modules may plug into this system to provide searches of different types of data. Most of the system is handled by search.module, so this must be enabled for all of the search features to work.

There are three ways to interact with the search system:

• Specifically for searching nodes, you can implement nodeapi('update_index') and nodeapi('search_result'). However, note that the search system already indexes all visible output of a node, i.e. everything displayed normally by hook_view() and hook_nodeapi('view'). This is usually sufficient. You should only use this mechanism if you want additional, non-visible data to be indexed.
• Implement hook_search(). This will create a search tab for your module on the /search page with a simple keyword search form. You may optionally implement hook_search_item() to customize the display of your results.
• Implement hook_update_index(). This allows your module to use Drupal's HTML indexing mechanism for searching full text efficiently.

If your module needs to provide a more complicated search form, then you need to implement it yourself without hook_search(). In that case, you should define it as a local task (tab) under the /search page (e.g. /search/mymodule) so that users can easily find it.

函数

名称	位置	描述
do_search	modules/search/search.module	Do a query on the full-text search index for a word or words.
hook_search	modules/search/search.api.php	Define a custom search routine.
hook_update_index	modules/search/search.api.php	Update Drupal's full-text index for this module.
search_box	modules/search/search.module	Form builder; Output a search form for the search block and the theme's search box. See alsosearch_box_form_submit()
search_box_form_submit	modules/search/search.module	Process a block search form submission.
search_data	modules/search/search.module	Perform a standard search on the given keys, and return the formatted results.
search_excerpt	modules/search/search.module	Returns snippets from a piece of text, with certain keywords highlighted. Used for formatting search results.
search_form	modules/search/search.module	Render a search form.
search_index	modules/search/search.module	Update the full-text search index for a particular item.
template_preprocess_search_block_form	modules/search/search.module	Process variables for search-block-form.tpl.php.
template_preprocess_search_theme_form	modules/search/search.module	Process variables for search-theme-form.tpl.php.