Php 文件获取内容（#）无法打开流HTTP请求失败

使用上面的代码，我试图为许多用户下载发票。但它抛出文件获取内容（#）无法打开流HTTP请求失败错误。我还使用下面的代码尝试了“Curl”，它也抛出了相同的错误

foreach($users as $user){

                            $url = web_url()."/user/invoice/generate?id=".$user->user_id."&month=".$month."&year=".$year;
                            $html = file_get_contents($url);
                            $file= public_path(). "/invoice/".$user->user_id."_".$month."_".$year.".pdf";
                            $headers = array(
                                'Content-Type' => 'application/pdf',
                            );
                            return Response::download($result, $user->user_id."_".$month."_".$year.".pdf", $headers);
                }

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有谁能告诉我下载许多发票的正确有效方法吗？

显然，这是一个错误的URL。您可以通过浏览器访问它吗？不，此URL显示发票页面。。它在浏览器中工作。Echo

$url

-将其复制并粘贴到您的地址栏中。那个有用吗？是的，那个url显示发票页面。试试看前两个答案

foreach($users as $user){

                            $url = web_url()."/user/invoice/generate?id=".$user->user_id."&month=".$month."&year=".$year;

                                $curl = curl_init();
                              curl_setopt($curl, CURLOPT_URL, $url);
                              curl_setopt($curl, CURLOPT_RETURNTRANSFER, true);
                              curl_setopt($curl, CURLOPT_HEADER, false);
                              $data = curl_exec($curl);
                              curl_close($curl);

                            $file= public_path(). "/invoice/".$user->user_id."_".$month."_".$year.".pdf";
                            $headers = array(
                                'Content-Type' => 'application/pdf',
                            );
                            return Response::download($result, $user->user_id."_".$month."_".$year.".pdf", $headers);
                }