Ticket #18195: update_metadata_by_mid3.3.patch

wp-includes/meta.php

@@ -322 +322 @@
 }
 
 /**
+ * Update meta data by meta ID
+ *
+ * @since 3.3.0
+ *
+ * @uses update_metadata() Calls update_metadata() to actually update the meta value after
+ *              the meta_key, object_id and prev_value are fetched.
+ * @uses get_metadata_by_mid() Calls get_metadata_by_mid() to fetch the meta key, value
+ *              and object_id of the given meta_id.
+ *
+ * @param string $meta_type Type of object metadata is for (e.g., comment, post, or user)
+ * @param int $meta_id ID for a specific meta row
+ * @param string $meta_value Metadata value
+ * @param string $meta_key Optional, you can provide a meta key to update it
+ * @return bool True on successful update, false on failure.
+ */
+function update_metadata_by_mid( $meta_type, $meta_id, $meta_value, $meta_key = false ) {
+        global $wpdb;
+        
+        if ( ! $meta_type )
+                return false;
+
+        if ( ! $meta_id = absint( $meta_id ) )
+                return false;
+
+        if ( ! $table = _get_meta_table( $meta_type ) )
+                return false;
+                
+        $column = esc_sql($meta_type . '_id');
+        $id_column = 'user' == $meta_type ? 'umeta_id' : 'meta_id';
+
+        // Fetch the meta and go on if it's found.
+        if ( $meta = get_metadata_by_mid( $meta_type, $meta_id ) ) {
+                $original_key = $meta->meta_key;
+                
+                // If a new meta_key (last parameter) was specified, change the meta key,
+                // otherwise use the original key in the update statement.
+                if ( false === $meta_key ) {
+                        $meta_key = $original_key;
+                } elseif ( is_string( $meta_key ) ) {
+                        $meta_key = stripslashes( $meta_key );
+                } else {
+                        return false;
+                }
+                        
+                // Sanitize the meta
+                $meta_value = stripslashes_deep( $meta_value );
+                $meta_value = sanitize_meta( $meta_key, $meta_value, $meta_type );
+                $meta_value = maybe_serialize( $meta_value );
+                
+                // Run the query.
+                return (bool) $wpdb->query( $wpdb->prepare( "UPDATE $table SET meta_key = %s, meta_value = %s WHERE $id_column = %d LIMIT 1;", $meta_key, $meta_value, $meta_id ) );
+        }
+        
+        // And if the meta was not found.
+        return false;
+}
+
+/**
  * Update the metadata cache for the specified objects.
  *
  * @since 2.9.0