Ticket #15805: 15805.1.patch

src/wp-includes/post.php

@@ -3484 +3484 @@
  * @param string $post_type Optional. Post type. Default page.
  * @return WP_Post|null WP_Post on success or null on failure
  */
-function get_page_by_title($page_title, $output = OBJECT, $post_type = 'page' ) {
+function get_page_by_title( $page_title, $output = OBJECT, $post_type = 'page' ) {
         global $wpdb;
-        $page = $wpdb->get_var( $wpdb->prepare( "SELECT ID FROM $wpdb->posts WHERE post_title = %s AND post_type= %s", $page_title, $post_type ) );
+
+        $cache_id = 'page_title_' . $page_title . $post_type;
+
+        if ( false === $page = wp_cache_get( $cache_id, 'posts' ) ) {
+                $page = $wpdb->get_var( $wpdb->prepare( "SELECT ID FROM $wpdb->posts WHERE post_title = %s AND post_type= %s", $page_title, $post_type ) );
+                wp_cache_add( $cache_id, $page, 'posts' );
+        }
+
         if ( $page )
                 return get_post( $page, $output );