Fixes DateUtil::validateDate()

Fixes WoltLab/WCF#1283 as gmdate returns a date in GMT but strtotime doesn't if input isn't specified as GMT.

See http://www.php.net/manual/en/function.strtotime.php
> Each parameter of this function uses the default time zone unless a time zone is specified in that parameter.```

diff --git a/wcfsetup/install/files/lib/util/DateUtil.class.php b/wcfsetup/install/files/lib/util/DateUtil.class.php
index 02893cb30d5e20efd2c5d7e61dd7947847f37817..fd022449f553ae43de68299e8554a1bf0a3ec84c 100644 (file)
--- a/wcfsetup/install/files/lib/util/DateUtil.class.php
+++ b/wcfsetup/install/files/lib/util/DateUtil.class.php
@@ -363,7 +363,7 @@ final class DateUtil {
                }
                
                // try to convert $date into a UNIX timestamp
-               $time = @strtotime($date);
+               $time = @strtotime($date." GMT");
                if ($time === false) {
                        throw new SystemException("date '".$date."' is invalid");
                }