初始化项目：添加后端代码、ThinkPHP框架、前端资源

extend/TuzhiEasyWeChat/Kernel/Helpers.php

@@ -0,0 +1,57 @@
+<?php
+
+/*
+ * This file is part of the overtrue/wechat.
+ *
+ * (c) overtrue <i@overtrue.me>
+ *
+ * This source file is subject to the MIT license that is bundled
+ * with this source code in the file LICENSE.
+ */
+
+namespace TuzhiEasyWeChat\Kernel;
+
+use TuzhiEasyWeChat\Kernel\Contracts\Arrayable;
+use TuzhiEasyWeChat\Kernel\Exceptions\RuntimeException;
+use TuzhiEasyWeChat\Kernel\Support\Arr;
+use TuzhiEasyWeChat\Kernel\Support\Collection;
+
+function data_get($data, $key, $default = null)
+{
+    switch (true) {
+        case is_array($data):
+            return Arr::get($data, $key, $default);
+        case $data instanceof Collection:
+            return $data->get($key, $default);
+        case $data instanceof Arrayable:
+            return Arr::get($data->toArray(), $key, $default);
+        case $data instanceof \ArrayIterator:
+            return $data->getArrayCopy()[$key] ?? $default;
+        case $data instanceof \ArrayAccess:
+            return $data[$key] ?? $default;
+        case $data instanceof \IteratorAggregate && $data->getIterator() instanceof \ArrayIterator:
+            return $data->getIterator()->getArrayCopy()[$key] ?? $default;
+        case is_object($data):
+            return $data->{$key} ?? $default;
+        default:
+            throw new RuntimeException(sprintf('Can\'t access data with key "%s"', $key));
+    }
+}
+
+function data_to_array($data)
+{
+    switch (true) {
+        case is_array($data):
+            return $data;
+        case $data instanceof Collection:
+            return $data->all();
+        case $data instanceof Arrayable:
+            return $data->toArray();
+        case $data instanceof \IteratorAggregate && $data->getIterator() instanceof \ArrayIterator:
+            return $data->getIterator()->getArrayCopy();
+        case $data instanceof \ArrayIterator:
+            return $data->getArrayCopy();
+        default:
+            throw new RuntimeException(sprintf('Can\'t transform data to array'));
+    }
+}