diff --git a/phpstan-bootstrap.php b/phpstan-bootstrap.php
index 97b17e66..4de7b497 100755
--- a/phpstan-bootstrap.php
+++ b/phpstan-bootstrap.php
@@ -1,5 +1,4 @@
 <?php
-
 // Boostrap file for PHPstand
 // sets the _SERVER['HTTP_HOST'] var so we can have DB detection
 $_SERVER['HTTP_HOST'] = 'soba.tokyo.tequila.jp';
diff --git a/phpstan.neon b/phpstan.neon
index b3df0604..4ef112e0 100644
--- a/phpstan.neon
+++ b/phpstan.neon
@@ -1,6 +1,7 @@
 # PHP Stan Config
 
 parameters:
+	tmpDir: /tmp/phpstan-clemens
 	level: 1
 	paths:
 		- %currentWorkingDirectory%/www
diff --git a/www/lib/CoreLibs/Basic.php b/www/lib/CoreLibs/Basic.php
index ae5d49d0..3ff04422 100644
--- a/www/lib/CoreLibs/Basic.php
+++ b/www/lib/CoreLibs/Basic.php
@@ -1664,6 +1664,9 @@ class Basic
 	 */
 	public static function checkDate($date): bool
 	{
+		if (!$date) {
+			return false;
+		}
 		list ($year, $month, $day) = preg_split("/[\/-]/", $date);
 		if (!$year || !$month || !$day) {
 			return false;
@@ -1681,6 +1684,9 @@ class Basic
 	 */
 	public static function checkDateTime($datetime): bool
 	{
+		if (!$datetime) {
+			return false;
+		}
 		list ($year, $month, $day, $hour, $min, $sec) = preg_split("/[\/\- :]/", $datetime);
 		if (!$year || !$month || !$day) {
 			return false;