From be98773ac97518e36db3420c845cb50dde416e16 Mon Sep 17 00:00:00 2001
From: Sergey Biryukov <sergeybiryukov@git.wordpress.org>
Date: Thu, 1 Oct 2015 00:22:37 +0000
Subject: [PATCH] Add `'submenu_file'` filter for the file of an admin menu
 sub-menu item.

This complements the `'parent_file'` filter added in [12712].

Props swissspidy, kraftbj.
Fixes #24531.

git-svn-id: https://develop.svn.wordpress.org/trunk@34722 602fd350-edb4-49c9-b593-d223f7449a82
---
 src/wp-admin/menu-header.php | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/src/wp-admin/menu-header.php b/src/wp-admin/menu-header.php
index 013686106f..0f067f247e 100644
--- a/src/wp-admin/menu-header.php
+++ b/src/wp-admin/menu-header.php
@@ -36,6 +36,16 @@ global $menu, $submenu, $parent_file;
  */
 $parent_file = apply_filters( 'parent_file', $parent_file );
 
+/**
+ * Filter the file of an admin menu sub-menu item.
+ *
+ * @since 4.4.0
+ *
+ * @param string $submenu_file The submenu file.
+ * @param string $parent_file  The submenu item's parent file.
+ */
+$submenu_file = apply_filters( 'submenu_file', $submenu_file, $parent_file );
+
 get_admin_page_parent();
 
 /**