From 33a2672121f96554b4b8b8f7ad162655fc2554b3 Mon Sep 17 00:00:00 2001
From: zhaoxiang <zhaoxiang051405@gmail.com>
Date: Tue, 8 May 2018 18:21:58 +0800
Subject: [PATCH] =?UTF-8?q?modified=20=E6=96=B0=E5=A2=9E=E4=B8=A2=E5=A4=B1?=
 =?UTF-8?q?=E7=9A=84Expression=E6=96=87=E4=BB=B6?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
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---
 thinkphp/library/think/db/Expression.php | 48 ++++++++++++++++++++++++
 1 file changed, 48 insertions(+)
 create mode 100755 thinkphp/library/think/db/Expression.php

diff --git a/thinkphp/library/think/db/Expression.php b/thinkphp/library/think/db/Expression.php
new file mode 100755
index 0000000..f1b92ab
--- /dev/null
+++ b/thinkphp/library/think/db/Expression.php
@@ -0,0 +1,48 @@
+<?php
+// +----------------------------------------------------------------------
+// | ThinkPHP [ WE CAN DO IT JUST THINK ]
+// +----------------------------------------------------------------------
+// | Copyright (c) 2006~2018 http://thinkphp.cn All rights reserved.
+// +----------------------------------------------------------------------
+// | Licensed ( http://www.apache.org/licenses/LICENSE-2.0 )
+// +----------------------------------------------------------------------
+// | Author: liu21st <liu21st@gmail.com>
+// +----------------------------------------------------------------------
+
+namespace think\db;
+
+class Expression
+{
+    /**
+     * 查询表达式
+     *
+     * @var string
+     */
+    protected $value;
+
+    /**
+     * 创建一个查询表达式
+     *
+     * @param  string  $value
+     * @return void
+     */
+    public function __construct($value)
+    {
+        $this->value = $value;
+    }
+
+    /**
+     * 获取表达式
+     *
+     * @return string
+     */
+    public function getValue()
+    {
+        return $this->value;
+    }
+
+    public function __toString()
+    {
+        return (string) $this->value;
+    }
+}