From 260f87bd6ee58ee076ae859679cce99395f56988 Mon Sep 17 00:00:00 2001
From: Ryan Boren <ryan@git.wordpress.org>
Date: Thu, 19 Feb 2009 18:39:04 +0000
Subject: [PATCH] Deactivate plugins that don't have valid plugin headers. see
 #9164

git-svn-id: https://develop.svn.wordpress.org/trunk@10594 602fd350-edb4-49c9-b593-d223f7449a82
---
 wp-admin/includes/plugin.php | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/wp-admin/includes/plugin.php b/wp-admin/includes/plugin.php
index 65de9f025a..7930ba1525 100644
--- a/wp-admin/includes/plugin.php
+++ b/wp-admin/includes/plugin.php
@@ -476,6 +476,9 @@ function validate_plugin($plugin) {
 	if ( ! file_exists(WP_PLUGIN_DIR . '/' . $plugin) )
 		return new WP_Error('plugin_not_found', __('Plugin file does not exist.'));
 
+	$installed_plugins = get_plugins();
+	if ( ! isset($installed_plugins[$plugin]) )
+		return new WP_Error('no_plugin_header', __('The plugin does not have a valid header.'));
 	return 0;
 }