From b3157cbfd859c914911b114d4edbba4654758b57 Mon Sep 17 00:00:00 2001
From: plegall <plg@piwigo.org>
Date: Thu, 17 Nov 2016 13:43:40 +0100
Subject: [PATCH] fixes #547, strong checks on url format

---
 include/functions.inc.php | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/include/functions.inc.php b/include/functions.inc.php
index 018747817..39b618d81 100644
--- a/include/functions.inc.php
+++ b/include/functions.inc.php
@@ -2055,6 +2055,16 @@ function mobile_theme()
  */
 function url_check_format($url)
 {
+  if (strpos($url, '"') !== false)
+  {
+    return false;
+  }
+
+  if (strncmp($url, 'http://', 7) !== 0 and strncmp($url, 'https://', 8) !== 0)
+  {
+    return false;
+  }
+
   return filter_var($url, FILTER_VALIDATE_URL, FILTER_FLAG_SCHEME_REQUIRED | FILTER_FLAG_HOST_REQUIRED)!==false;
 }