Ticket #24266: 24266.3.diff

wp-includes/meta.php

@@ -104 +104 @@
         $mid = (int) $wpdb->insert_id;
 
         wp_cache_delete($object_id, $meta_type . '_meta');
+        
+        // Don't fire for comment or user meta
+        if ( 'post' === $meta_type ) {
+                _collect_updated_postmeta_post_ids( $object_id );
+        }
 
         /**
          * Fires immediately after meta of a specific type is added.
@@ -268 +273 @@
                  * @param string $meta_key   Meta key.
                  * @param mixed  $meta_value Meta value.
                  */
+                _collect_updated_postmeta_post_ids( $object_id );
                 do_action( 'updated_postmeta', $meta_id, $object_id, $meta_key, $meta_value );
         }
 
@@ -411 +417 @@
 
         // Old-style action.
         if ( 'post' == $meta_type ) {
+                if ( $delete_all ) {
+                        foreach ( (array) $object_ids as $o_id ) {
+                                _collect_updated_postmeta_post_ids( $o_id );
+                        }
+                } else {
+                        _collect_updated_postmeta_post_ids( $object_id );
+                }
                 /**
                  * Fires immediately after deleting metadata for a post.
                  *

wp-includes/post.php

@@ -5482 +5482 @@
 }
 
 /**
+ * Internal function that collects all updated post IDs when meta was changed.
+ * 
+ * Modified post date will be updated later on the shutdown hook.
+ * 
+ * @since 4.1
+ * 
+ * @param int $post_id the ID of the modified Post object.
+ */
+function _collect_updated_postmeta_post_ids( $post_id ) {
+        global $updated_post_ids;
+        
+        if ( empty( $updated_post_ids ) ) {
+                $updated_post_ids = array();
+        } 
+        if ( ! in_array( $post_id, $updated_post_ids ) ) {
+                $updated_post_ids[] = $post_id;
+        }
+}
+
+/**
+ * Helper function for updating the post modified date.
+ * 
+ * Iterates over all post IDs updated during the request when meta has been changed.
+ *  
+ * @since 4.1
+ * 
+ */
+function update_post_modified_dates() {
+        global $updated_post_ids;
+        
+        // Check whether posts' metadata has been changed during the request
+        if ( ! empty( $updated_post_ids ) && is_array( $updated_post_ids ) ) {
+                $post_modified     = current_time( 'mysql' );
+                $post_modified_gmt = current_time( 'mysql', 1 );
+                global $wpdb;
+                
+                $updated_fields = array( 
+                        'post_modified' => $post_modified,
+                        'post_modified_gmt' => $post_modified_gmt
+                );
+                
+                // Update the post_modified dates for each modified post
+                foreach ( $updated_post_ids as $post_id ) {
+                        $where = array( 'ID' => $post_id );
+                        $wpdb->update( $wpdb->posts, $updated_fields, $where );
+                        
+                        clean_post_cache( $post_id );
+                }
+        }
+}
+add_action( 'shutdown', 'update_post_modified_dates' );
+
+/**
  * Call major cache updating functions for list of Post objects.
  *
  * @since 1.5.0