feat(core): Add a DataTime to Zulu time format util

app/Utils/DateTimeToIso8601ZuluString.php

@@ -0,0 +1,43 @@
+<?php
+
+declare(strict_types=1);
+
+/*
+ * +----------------------------------------------------------------------+
+ * |                          ThinkSNS Plus                               |
+ * +----------------------------------------------------------------------+
+ * | Copyright (c) 2018 Chengdu ZhiYiChuangXiang Technology Co., Ltd.     |
+ * +----------------------------------------------------------------------+
+ * | This source file is subject to version 2.0 of the Apache license,    |
+ * | that is bundled with this package in the file LICENSE, and is        |
+ * | available through the world-wide-web at the following url:           |
+ * | http://www.apache.org/licenses/LICENSE-2.0.html                      |
+ * +----------------------------------------------------------------------+
+ * | Author: Slim Kit Group <master@zhiyicx.com>                          |
+ * | Homepage: www.thinksns.com                                           |
+ * +----------------------------------------------------------------------+
+ */
+
+namespace Zhiyi\Plus\Utils;
+
+use Carbon\Carbon;
+
+trait DateTimeToIso8601ZuluString
+{
+    /**
+     * DateTime to ISO 8601 Zulu time.
+     * 
+     * @param {\DateTime|string|null} $dateTime
+     * @return string
+     */
+    protected function dateTimeToIso8601ZuluString($dateTime = null): ?string
+    {
+        if (is_null($dateTime) || empty($dateTime)) {
+            return null;
+        } elseif (!($dateTime instanceof Carbon)) {
+            $dateTime = new Carbon($dateTime);
+        }
+
+        return $dateTime->toIso8601ZuluString();
+    }
+}