From be4d218af17a12a9e21bcd6c01086ea3bf2541b5 Mon Sep 17 00:00:00 2001
From: Jordan Dukart <jordan@discoverygarden.ca>
Date: Thu, 26 Sep 2013 17:33:44 +0000
Subject: [PATCH] Add sanitation function.

---
 includes/utilities.inc | 16 ++++++++++++++++
 1 file changed, 16 insertions(+)

diff --git a/includes/utilities.inc b/includes/utilities.inc
index 6366305e..2139ae09 100644
--- a/includes/utilities.inc
+++ b/includes/utilities.inc
@@ -908,3 +908,19 @@ function islandora_as_renderable_array(&$markup_array) {
   }
   unset($value);
 }
+
+/**
+ * Sanitizes an input string to be valid XML.
+ *
+ * @param string $input
+ *   An input string.
+ * @param string $replacement
+ *   What we are replacing invalid characters with, defaults to ''.
+ *
+ * @return string
+ *   The sanitized string.
+ */
+function islandora_sanitize_input_for_valid_xml($input, $replacement = '') {
+  $input = preg_replace('/[^\x9\xA\xD\x20-\x{D7FF}\x{E000}-\x{FFFD}\x{10000}-\x{10FFFF}]/u', $replacement, $input);
+  return $input;
+}