public function down() { header('content-type:application:json;charset=utf8'); header('access-control-allow-origin:https://coucouchina.com'); header('access-control-allow-methods:post'); header('access-control-allow-headers:x-requested-with,content-type'); header("content-type:text/html;charset=utf-8");// $file_name="cookie.jpg"; $file_name = "apple-app-site-association";//用以解决中文不能显示出来的问题 $file_name = iconv("utf-8", "gb2312", $file_name); $file_sub_path = $_server['document_root'] . "/"; $file_path = $file_sub_path . $file_name;//首先要判断给定的文件存在与否 if (!file_exists($file_path)) { echo "没有该文件文件"; return; } $fp = fopen($file_path, "r"); $file_size = filesize($file_path);//下载文件需要用到的头 header("content-type: application/octet-stream"); header("accept-ranges: bytes"); header("accept-length:" . $file_size); header("content-disposition: attachment; filename=" . $file_name); $buffer = 1024; $file_count = 0;//向浏览器返回数据 while (!feof($fp) && $file_count < $file_size) { $file_con = fread($fp, $buffer); $file_count += $buffer; echo $file_con; } fclose($fp); }
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以上就是php下载文件的代码的详细内容。