初始化项目：添加后端代码、ThinkPHP框架、前端资源

application/common/library/Log.php

@@ -0,0 +1,29 @@
+<?php
+
+namespace app\common\library;
+
+use Psr\Log\AbstractLogger;
+use think\Hook;
+
+/**
+ * 日志记录类
+ */
+class Log extends AbstractLogger
+{
+
+    /**
+     * Logs with an arbitrary level.
+     *
+     * @param mixed   $level
+     * @param string  $message
+     * @param mixed[] $context
+     *
+     * @return void
+     *
+     * @throws \Psr\Log\InvalidArgumentException
+     */
+    public function log($level, $message, array $context = array())
+    {
+        \think\Log::write($message);
+    }
+}