本文介绍了PHP中如何获取复制功能的进度状态?的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！
问题描述
我需要知道如何在 PHP 中获取 copy() 函数的状态.
I need to know how to get the status of the copy() function in PHP.
我正在使用这个功能下载一个远程文件，我想要这个程序的进度条.
I am using this function to download a remote file, and I want a progress bar for this program.
推荐答案
您需要编写自己的复制函数.首先通过 HTTP HEAD 请求检查文件大小，例如使用此解决方案:
You'll need to write your own copy function. First check the file size through a HTTP HEAD request, for example with this solution:
http://php.net/manual/en/function.filesize.php#92462
然后执行此操作以获取文件:
Then do this to fetch the file:
$remote = fopen('remote-file', 'r');
$local = fopen('local-file', 'w');
$read_bytes = 0;
while(!feof($remote)) {
$buffer = fread($remote, 2048);
fwrite($local, $buffer);
$read_bytes += 2048;
//Use $filesize as calculated earlier to get the progress percentage
$progress = min(100, 100 * $read_bytes / $filesize);
//you'll need some way to send $progress to the browser.
//maybe save it to a file and then let an Ajax call check it?
}
fclose($remote);
fclose($local);
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