Update Prepr.php

Author: tim-hanssen

src/Prepr.php

@@ -327,10 +327,10 @@ public function nestedArrayToMultipart(array $array)
         return $multipart;
     }
 
-    public function data_get(array $array, string $variable)
+    public function data_get($array, string $variable)
     {
-        if(isset($array[$variable])) {
+        if($array && isset($array[$variable])) {
             return $array[$variable];
         }
     }
-}
+}