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问题：
php的这段代码，不支持访问http时redirect到https，如：
访问：http://jtgl.beijing.gov.cn/jgj/lszt/659722/660341/index.html
307 Temporary Redirect导到：https://jtgl.beijing.gov.cn/jgj/lszt/659722/660341/index.html

请将该函数修改成能自动导到https并获取到相应body内容:
//发起https的get请求
function https_get($url,$timeout=120){
   $curl = curl_init();
   curl_setopt($curl, CURLOPT_URL, $url);
   curl_setopt($curl, CURLOPT_HEADER, 0);
   curl_setopt($curl, CURLOPT_RETURNTRANSFER, 1);
   curl_setopt($curl, CURLOPT_TIMEOUT,$timeout);
   curl_setopt($curl, CURLOPT_SSL_VERIFYPEER, false);  // 跳过检查                                                                                                                  
   curl_setopt($curl, CURLOPT_SSL_VERIFYHOST, false);  // 跳过检查                                                                                                                  
   $res = curl_exec($curl);                                                                                                                                                          
   curl_close($curl);                                                                                                                                                                
   return $res;   //返回json对象                                                                                                                                                    
}  

回答：
要在PHP中自动将HTTP请求重定向到HTTPS并获取响应内容，您可以使用curl来检测HTTP响应头中的重定向，然后执行相应的HTTPS请求。以下是修改后的函数示例：

function https_get($url, $timeout = 120) {
    $curl = curl_init();
    curl_setopt($curl, CURLOPT_URL, $url);
    curl_setopt($curl, CURLOPT_HEADER, true);
    curl_setopt($curl, CURLOPT_RETURNTRANSFER, true);
    curl_setopt($curl, CURLOPT_TIMEOUT, $timeout);
    curl_setopt($curl, CURLOPT_SSL_VERIFYPEER, false);
    curl_setopt($curl, CURLOPT_SSL_VERIFYHOST, false);
    curl_setopt($curl, CURLOPT_FOLLOWLOCATION, true); // 启用重定向跟随

    $response = curl_exec($curl);

    $httpCode = curl_getinfo($curl, CURLINFO_HTTP_CODE);
    if ($httpCode == 301 || $httpCode == 302) {
        $matches = array();
        preg_match('/Location:(.*?)\n/', $response, $matches);
        $newUrl = trim(array_pop($matches));

        if (!empty($newUrl)) {
            curl_setopt($curl, CURLOPT_URL, $newUrl);
            $response = curl_exec($curl);
        }
    }

    curl_close($curl);
    return $response;
}

$url = "http://jtgl.beijing.gov.cn/jgj/lszt/659722/660341/index.html";
$response = https_get($url);
echo $response;


php -a 测试是OK的。




问题二：那直接在shell下用curl命令实现上面307的Location转向获取到转向后的内容，用什么参数实现呢？我记得好像是有相应参数的。
是的，您可以使用`curl`命令行工具来获取重定向后的内容。要实现HTTP 307重定向的自动跟随，您可以使用`-L`或`--location`参数，这会让`curl`自动跟随重定向并获取最终的内容。下面是示例：
curl -L http://jtgl.beijing.gov.cn/jgj/lszt/659722/660341/index.html

使用`-L`参数，`curl`将自动处理HTTP 307 Temporary Redirect，并获取最终的内容。

3XX response code


       -L, --location
              (HTTP) If the server reports that the requested page has moved to a different location (indicated with a Location: header and a 3XX response code), this option will make
              curl redo the request on the new place. If used together with -i, --include or -I, --head, headers from all requested pages will be shown. When authentication is used, curl
              only sends its credentials to the initial host. If a redirect takes curl to a different host, it will not be able to intercept the user+password. See also --location-
              trusted on how to change this. You can limit the amount of redirects to follow by using the --max-redirs option.

作者：jackxiang@向东博客 专注WEB应用 构架之美 --- 构架之美，在于尽态极妍 | 应用之美，在于药到病除
地址：https://jackxiang.com/post/12080/
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