客户端跨域请求

客户端发送GET或POST之前，

可能会先发送OPTION请求，以查询服务是否支持跨域。所以thinkphp需要做两样事：

1、响应OPTION请求支持跨域。

2、响应实际的GET/POST请求支持跨域。

OPTION请求支持跨域

在public\index.php开始地方添加：

if($_SERVER['REQUEST_METHOD'] == 'OPTIONS') {
    header("Access-Control-Allow-Origin: *");
    header("Access-Control-Allow-Headers: Origin, X-Requested-With, Content-Type, Accept, Authorization");
    header('Access-Control-Allow-Methods: GET, POST, PUT,DELETE,OPTIONS,PATCH');
    exit();
}

GET/POST请求支持跨域

在public\index.php最后地方添加：

header("Access-Control-Allow-Origin: *");
header("Access-Control-Allow-Headers: Origin, X-Requested-With, Content-Type, Accept, Authorization");
header('Access-Control-Allow-Methods: GET, POST, PUT,DELETE,OPTIONS,PATCH');

最后整个public\index.php代码：

<?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>
// +----------------------------------------------------------------------

// [ 应用入口文件 ]
namespace think;

// OPTION请求支持跨域
if($_SERVER['REQUEST_METHOD'] == 'OPTIONS') {
    header("Access-Control-Allow-Origin: *");
    header("Access-Control-Allow-Headers: Origin, X-Requested-With, Content-Type, Accept, Authorization");
    header('Access-Control-Allow-Methods: GET, POST, PUT,DELETE,OPTIONS,PATCH');
    exit();
}


// 加载基础文件
require __DIR__ . '/../thinkphp/base.php';

// 支持事先使用静态方法设置Request对象和Config对象

// 执行应用并响应
Container::get('app')->run()->send();

// GET POST请求支持跨域
header("Access-Control-Allow-Origin: *");
header("Access-Control-Allow-Headers: Origin, X-Requested-With, Content-Type, Accept, Authorization");
header('Access-Control-Allow-Methods: GET, POST, PUT,DELETE,OPTIONS,PATCH');