Suppport default strategy.

Signed-off-by: overtrue <[email protected]>

src/Strategies/OrderStrategy.php

@@ -0,0 +1,30 @@
+<?php
+
+/*
+ * This file is part of the overtrue/easy-sms.
+ * (c) overtrue <[email protected]>
+ * This source file is subject to the MIT license that is bundled
+ * with this source code in the file LICENSE.
+ */
+
+namespace Overtrue\EasySms\Strategies;
+
+use Overtrue\EasySms\Contracts\StrategyInterface;
+
+/**
+ * Class OrderStrategy.
+ */
+class OrderStrategy implements StrategyInterface
+{
+    /**
+     * Apply the strategy and return result.
+     *
+     * @param array $gateways
+     *
+     * @return array
+     */
+    public function apply(array $gateways)
+    {
+        return $gateways;
+    }
+}

src/Strategies/RadomStrategy.php

@@ -23,7 +23,7 @@ class RandomStrategy implements StrategyInterface
      */
     public function apply(array $gateways)
     {
-        uasort($gateways, function() {
+        uasort($gateways, function () {
             return mt_rand() - mt_rand();
         });