我有一个下载.php文件，如下所示。 当我从PC互联网浏览器单击下载.php页面时，它工作正常并发送单个请求。但是当我从移动设备单击同一页面时，它会发送两个请求。
$filename ="test.mp3";
LogWriter($filename);
header("Pragma: public"); // required
header("Expires: 0");
header("Cache-Control: must-revalidate, post-check=0, pre-check=0");
header("Cache-Control: private",false); // required for certain browsers
header("Content-Type: application/octet-stream");
header("Content-Disposition: attachment; filename='"".basename($filename)."'";" );
header("Content-Transfer-Encoding: binary");
header("Content-Length: ".filesize($filename));
readfile("$filename");
从PC单击时的日志文件：
时间： 2014-12-23 13：20：24||消息：测试.mp3
当我从移动设备单击同一文件时日志文件：
Time: 2014-12-23 13:31:24|| Message: test.mp3
Time: 2014-12-23 13:31:28|| Message: test.mp3
知道吗？请帮忙。
创建一个会话，告诉您几秒钟前已请求
session_start();
$filename ="test.mp3";
if(!empty($_SESSION['download_'.$filename]) &&
(time() - $_SESSION['download_'.$filename) < 10)) exit;
// Check, then exit if you have requested before in 10 seconds
$_SESSION['download_'.$filename] = time();
LogWriter($filename);
header("Pragma: public"); // required
header("Expires: 0");
header("Cache-Control: must-revalidate, post-check=0, pre-check=0");
header("Cache-Control: private",false); // required for certain browsers
header("Content-Type: application/octet-stream");
header("Content-Disposition: attachment; filename='"".basename($filename)."'";" );
header("Content-Transfer-Encoding: binary");
header("Content-Length: ".filesize($filename));
readfile("$filename");
注意：但你不能在服务器端弄错它。因为这是客户端问题