Modify News Archive search

Search post title and content

functions.php

@@ -386,18 +386,15 @@ function prefix_ajax_clas_cat_posts() { //Retieves posts of a specific category
 	die();
 }
 
-
 add_action( 'wp_ajax_clas_search_archive', 'prefix_ajax_clas_search_archive' );
 add_action('wp_ajax_nopriv_clas_search_archive', 'prefix_ajax_clas_search_archive');
 function prefix_ajax_clas_search_archive() { //Retieves posts of a specific category or tag, using cat/tag id
 	$search = $_POST['search'];
-
-	global $wpdb;
-	$results = $wpdb->get_col( $wpdb->prepare("SELECT ID FROM $wpdb->posts WHERE post_status = 'publish' AND post_title LIKE %s;", '%' . $wpdb->esc_like($search) . '%') );
-	$archiveQuery = new WP_Query( 'category_name=archive&fields=ids' );
+
+	$archiveQuery = new WP_Query( 'category_name=archive&fields=ids&s='.$search.'' );
 	$archivePosts = $archiveQuery->get_posts();
 	$object = new stdClass();
-	foreach( $results as $k=>$id ){
+	foreach( $archivePosts as $k=>$id ){
 		if( in_array($id, $archivePosts) ){
 			$link = get_permalink($id);
 			$title = get_the_title($id);