Search interface

  1. drupal
    1. 5
    2. 6
    3. 7
    4. 8

The 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 hook_node_update_index() and hook_node_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_node_view(). This is usually sufficient. You should only use this mechanism if you want additional, non-visible data to be indexed.
  • Implement hook_search_info(). This will create a search tab for your module on the /search page with a simple keyword search form. You will also need to implement hook_search_execute() to perform the search.
  • 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_info(). 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.

Functions & methods

hook_search_accessDefine access to a custom search routine.
hook_search_adminAdd elements to the search settings form.
hook_search_executeExecute a search for a set of key words.
hook_search_infoDefine a custom search type.
hook_search_preprocessPreprocess text for search.
hook_search_resetTake action when the search index is going to be rebuilt.
hook_search_statusReport the status of indexing.
hook_update_indexUpdate the search index for this module.
sample_search_conditions_callbackAn example conditions callback function for search.
search_boxForm builder; Output a search form for the search block's search box.
search_box_form_submitProcess a block search form submission.
search_dataPerforms a search by calling hook_search_execute().
search_excerptReturns snippets from a piece of text, with certain keywords highlighted. Used for formatting search results.
search_formBuilds a search form.
search_indexUpdate the full-text search index for a particular item.

modules/search/search.module, line 917