improve customer api & gui

common/helpers/AppDateTimeHelper.php

@@ -0,0 +1,16 @@
+<?php
+
+namespace common\helpers;
+
+class AppDateTimeHelper
+{
+
+    public static function convertMySqlDatetimeToPhpInteger($dateString){
+        if (!isset($dateString)  || empty($dateString)){
+            return null;
+        }
+        $unixTime = strtotime($dateString . " UTC");
+        return $unixTime;
+    }
+
+}