Add support for flush_runtime and flush_group

object-cache.php

@@ -155,6 +155,35 @@ function wp_cache_get_multiple( $keys, $group = '', $force = false ) {
 	return $wp_object_cache->get_multiple( $keys, $group, $force );
 }
 
+/**
+ * Removes all cache items from the in-memory runtime cache.
+ *
+ * @see WP_Object_Cache::flush()
+ *
+ * @return bool True on success, false on failure.
+ */
+function wp_cache_flush_runtime() {
+	return wp_cache_flush();
+}
+
+/**
+ * Removes all cache items in a group, if the object cache implementation supports it.
+ *
+ * Before calling this function, always check for group flushing support using the
+ * `wp_cache_supports( 'flush_group' )` function.
+ *
+ * @see WP_Object_Cache::flush_group()
+ * @global WP_Object_Cache $wp_object_cache Object cache global instance.
+ *
+ * @param string $group Name of group to remove from cache.
+ * @return bool True if group was flushed, false otherwise.
+ */
+function wp_cache_flush_group( $group ) {
+	global $wp_object_cache;
+
+	return $wp_object_cache->flush_group( $group );
+}
+
 /**
  * Increment numeric cache item's value
  *
@@ -302,13 +331,13 @@ function wp_cache_reset() {
 function wp_cache_supports( $feature ) {
 	switch ( $feature ) {
 		case 'get_multiple':
+		case 'flush_runtime':
+		case 'flush_group':
 			return true;
 
 		case 'add_multiple':
 		case 'set_multiple':
 		case 'delete_multiple':
-		case 'flush_runtime':
-		case 'flush_group':
 		default:
 			return false;
 	}
@@ -637,6 +666,18 @@ public function flush( $redis = true ) {
 		return true;
 	}
 
+	/**
+	 * Removes all cache items in a group.
+	 *
+	 * @param string $group Name of group to remove from cache.
+	 * @return true Always returns true.
+	 */
+	public function flush_group( $group ) {
+		unset( $this->cache[ $group ] );
+
+		return true;
+	}
+
 	/**
 	 * Retrieves the cache contents, if it exists
 	 *