Available from version 1.12.0
Override the title prefix search used for OpenSearch and AJAX search suggestions.
Define function:
public static function onPrefixSearchBackend( $ns, $search, $limit, &$results ) { ... }
Attach hook: In extension.json:
	"Hooks": {
		"PrefixSearchBackend": "MediaWiki\\Extension\\MyExtension\\Hooks::onPrefixSearchBackend"
Called from: File(s): search/PrefixSearch.php, search/SearchEngine.php
Interface: PrefixSearchBackendHook.php

For more information about attaching hooks, see Manual:Hooks .
For examples of extensions using this hook, see Category:PrefixSearchBackend extensions.


  • $ns: int namespace key to search in
  • $search: search term (not guaranteed to be conveniently normalized)
  • $limit: maximum number of results to return
  • &$results: out param: array of page names (strings)