Ticket #25517: 25517.2.diff

src/wp-admin/async-upload.php

@@ -94 +94 @@
 } else {
         // long form response - big chunk o html
         $type = $_REQUEST['type'];
-        echo apply_filters("async_upload_{$type}", $id);
+
+        /**
+         * Filter the returned ID of an uploaded attachment.
+         *
+         * The dynamic portion of the hook name, $type, refers to the attachment type,
+         * such as 'iamge', 'audio', 'video', 'file', etc.
+         *
+         * @since 2.5.0
+         *
+         * @param int $id Uploaded attachment ID.
+         */
+        echo apply_filters( "async_upload_{$type}", $id );
 }