Fix various notices caused by invalid parameter values (#13511)

* Properly check dates used for period factory

* Properly check given idSite for rowevolution

* Improve example API to check given parameter type

* cast idSite parameter in ImageGraph API method

1 files changed, 1 insertions, 1 deletions

diff --git a/core/Period/Factory.php b/core/Period/Factory.php
index ee6fd3b7c9..5f7836dee0 100644
--- a/core/Period/Factory.php
+++ b/core/Period/Factory.php
@@ -80,7 +80,7 @@ abstract class Factory
             }
 
             $dateObject = Date::factory($date);
-        } else if (!empty($date)) {
+        } else if ($date instanceof Date) {
             $dateObject = $date;
         } else {
             throw new \Exception("Invalid date supplied to Period\Factory::build(): " . gettype($date));