1 files changed, 9 insertions, 5 deletions

diff --git a/application/Utils.php b/application/Utils.php
index 4b7fc546..9c9eaaa2 100644
--- a/application/Utils.php
+++ b/application/Utils.php
@@ -87,10 +87,14 @@ function endsWith($haystack, $needle, $case = true)
  *
  * @param mixed $input Data to escape: a single string or an array of strings.
  *
- * @return string escaped.
+ * @return string|array escaped.
  */
 function escape($input)
 {
+    if (null === $input) {
+        return null;
+    }
+
     if (is_bool($input)) {
         return $input;
     }
@@ -294,15 +298,15 @@ function normalize_spaces($string)
  * Requires php-intl to display international datetimes,
  * otherwise default format '%c' will be returned.
  *
- * @param DateTime $date to format.
- * @param bool     $time Displays time if true.
- * @param bool     $intl Use international format if true.
+ * @param DateTimeInterface $date to format.
+ * @param bool              $time Displays time if true.
+ * @param bool              $intl Use international format if true.
  *
  * @return bool|string Formatted date, or false if the input is invalid.
  */
 function format_date($date, $time = true, $intl = true)
 {
-    if (! $date instanceof DateTime) {
+    if (! $date instanceof DateTimeInterface) {
         return false;
     }