1 files changed, 38 insertions, 0 deletions

diff --git a/include/functions_url.inc.php b/include/functions_url.inc.php
index 02b938ecb..906cf915a 100644
--- a/include/functions_url.inc.php
+++ b/include/functions_url.inc.php
@@ -794,4 +794,42 @@ function get_gallery_home_url()
     return make_index_url();
   }
 }
+
+/**
+ * returns $_SERVER['QUERY_STRING'] whithout keys given in parameters
+ *
+ * @param string[] $rejects
+ * @param boolean $escape escape *&* to *&*
+ * @returns string
+ */
+function get_query_string_diff($rejects=array(), $escape=true)
+{
+  if (empty($_SERVER['QUERY_STRING']))
+  {
+    return '';
+  }
+
+  parse_str($_SERVER['QUERY_STRING'], $vars);
+
+  $vars = array_diff_key($vars, array_flip($rejects));
+  
+  return '?' . http_build_query($vars, '', $escape ? '&' : '&');
+}
+
+/**
+ * returns true if the url is absolute (begins with http)
+ *
+ * @param string $url
+ * @returns boolean
+ */
+function url_is_remote($url)
+{
+  if ( strncmp($url, 'http://', 7)==0
+    or strncmp($url, 'https://', 8)==0 )
+  {
+    return true;
+  }
+  return false;
+}
+
 ?>
\ No newline at end of file