Php 卷曲错误：我无法在CodeIgniter 3中卷曲到本地URL

我最近将一个应用程序和环境从PHP5升级到PHP7，将Codeigniter 2升级到Codeigniter 3。但是，应用程序需要自我卷曲，而过去的工作方式现在给了我以下错误：

操作在30000毫秒后超时，接收到0字节

下面是代码，，我在一个外部URL上试用过，效果很好

    $fullURL = 'http://localhost/andrew/index';

    // create curl resource
    $ch = curl_init();

    $curlOpts = [
        CURLOPT_SSL_VERIFYPEER  => false,
        CURLOPT_COOKIE          => session_name() . '=' . session_id(),
        CURLOPT_COOKIESESSION   => true,
        CURLOPT_REFERER         => $domain.$_SERVER['REQUEST_URI'],
        CURLOPT_RETURNTRANSFER  => true,   // return web page
        CURLOPT_HEADER          => false,  // don't return headers
        CURLOPT_FOLLOWLOCATION  => true,   // follow redirects
        CURLOPT_MAXREDIRS       => 10,     // stop after 10 redirects
        CURLOPT_ENCODING        => "",     // handle compressed
        CURLOPT_USERAGENT       => $_SERVER['HTTP_USER_AGENT'], // name of client
        CURLOPT_AUTOREFERER     => true,   // set referrer on redirect
        CURLOPT_CONNECTTIMEOUT  => $timeout,    // time-out on connect
        CURLOPT_TIMEOUT         => $timeout,    // time-out on response,
        CURLOPT_HTTPHEADER      => [],

        CURLOPT_SSL_VERIFYSTATUS => false,
        CURLOPT_SSL_VERIFYHOST => false,
        CURLOPT_SSLVERSION => 3,
        CURLOPT_URL => $fullURL,
    ];

    if ($ajax) {
        $curlOpts[CURLOPT_HTTPHEADER][] = 'X-Requested-With: XMLHttpRequest';
    }

    curl_setopt_array($ch, $curlOpts);

    // $output contains the output string
    $output = curl_exec($ch);
    $http_code = curl_getinfo($ch, CURLINFO_HTTP_CODE);

    $errors = curl_error($ch);

    // close curl resource to free up system resources
    curl_close($ch);

我认为这是一个应用程序问题，所以我制作了最基本的控制器来测试：

<?php

class Andrew extends CI_Controller
{
    public function index()
    {
        die ('hello world');
    }
}

---

. 这可能是一个安全风险！您似乎忽略了向我们（更重要的是您自己）展示在本地系统上运行时$fullURL是什么。。。在使用它之前的某个地方，一个var_转储（$fullURL）；对我们所有人都有效：）@Dharman，这不是安全风险，因为它只在本地部署URLs@TimBrownlaw我已经添加了一个示例url，但我已经在调试和手动请求中检查了它们。您的简单控制器测试没有证明cURL请求的可行性。尝试

类扩展CI_控制器{public function index（）{echo'hello world'；}}

并查看发生了什么。

class Andrew extends CI_Controller
{
    public function __construct()
    {
        die('test'); // <-- cURL request resolves fine with this, $output = 'test'
        parent::__construct();
    }
    public function index()
    {
        die ('hello world');
    }
}

public function config($file, $use_sections = FALSE, $fail_gracefully = FALSE)
{
    return get_instance()->config->load($file, $use_sections, $fail_gracefully); // <-- When a cURL request, get_instance()->config is a stdClass rather than an instance of `CI_Config`
}