Index: LinkSearch.php
===================================================================
--- LinkSearch.php	(revision 17406)
+++ LinkSearch.php	(working copy)
@@ -23,8 +23,19 @@
 		/*function*/ false, /*file*/ false );
 	
 	class LinkSearchPage extends QueryPage {
-		function __construct( $query ) {
+		/// Query
+		private $mQuery;
+		/// Namespace to search
+		private $mNamespace;
+		
+		/// Constructor
+		/**
+		 * @param $query string Query
+		 * @param $namespace mixed Namespace to search (int) or '' for all namespaces
+		 */
+		function __construct( $query, $namespace = '' ) {
 			$this->mQuery = $query;
+			$this->mNamespace = $namespace;
 		}
 		
 		function getName() {
@@ -50,7 +61,7 @@
 		}
 		
 		function linkParameters() {
-			return array( 'target' => $this->mQuery );
+			return array( 'target' => $this->mQuery, 'namespace' => $this->mNamespace );
 		}
 		
 		function getSQL() {
@@ -59,6 +70,12 @@
 			$page = $dbr->tableName( 'page' );
 			$externallinks = $dbr->tableName( 'externallinks' );
 			
+			if( $this->mNamespace == '' ) {
+				$namespace = '';
+			} else {
+				$namespace = 'AND page_namespace = ' . intval( $this->mNamespace );
+			}
+			
 			$encSearch = $dbr->addQuotes( self::mungeQuery( $this->mQuery ) );
 			
 			return
@@ -72,7 +89,8 @@
 					$externallinks FORCE INDEX (el_index)
 				WHERE
 					page_id=el_from
-					AND el_index LIKE $encSearch";
+					AND el_index LIKE $encSearch
+					$namespace";
 		}
 		
 		function formatResult( $skin, $result ) {
@@ -115,6 +133,7 @@
 	function wfSpecialLinksearch( $par=null ) {
 		list( $limit, $offset ) = wfCheckLimits();
 		$target = $GLOBALS['wgRequest']->getVal( 'target', $par );
+		$namespace = $GLOBALS['wgRequest']->getVal( 'namespace', '' );
 		
 		$self = Title::makeTitle( NS_SPECIAL, 'Linksearch' );
 		
@@ -124,12 +143,14 @@
 			wfOpenElement( 'form',
 				array( 'method' => 'get', 'action' => $GLOBALS['wgScript'] ) ) .
 			wfHidden( 'title', $self->getPrefixedDbKey() ) .
-			wfInput( 'target', 50, $target ) .
+			'<p>' . wfInput( 'target', 50, $target ) . "</p>\n" .
+			'<p>' . wfMsgExt( 'namespace', array( 'parseinline') ) .
+			XML::namespaceSelector( $namespace, '' ) . "</p>\n" .
 			wfSubmitButton( wfMsg( 'search' ) ) .
 			wfCloseElement( 'form' ) );
 
 		if( $target != '' ) {
-			$searcher = new LinkSearchPage( $target );
+			$searcher = new LinkSearchPage( $target, $namespace );
 			$searcher->doQuery( $offset, $limit );
 		}
 	}