如果您使用 X-Sendfile,您无法检测到客户端何时完成下载文件。最简单的方法是通过脚本流文件。
$handle = fopen($filepath, 'rb');
if ($handle !== false) {
@flock($handle, LOCK_SH);
$size = filesize($filepath);
$filename = basename($filepath);
$old_max_execution_time = ini_get('max_execution_time');
ini_set('max_execution_time', 0);
$old_cache_limiter = session_cache_limiter();
session_cache_limiter(false);
if (ob_get_length()) ob_clean();
header('Content-Type: application/octet-stream');
header('Content-Transfer-Encoding: binary');
header('Content-disposition: attachment; filename="'. $filename .'"');
header('Expires: Mon, 26 Jul 1997 05:00:00 GMT');
header('Accept-Ranges: bytes');
header('Cache-control: private');
header('Pragma: private');
set_time_limit(0);
while (! feof($handle) && (connection_status() === 0)) {
if (! $buffer = @fread($handle, $interval)) {
// Error
exit;
}
print($buffer);
flush();
}
@flock($handle, LOCK_UN);
@fclose($handle);
ini_set('max_execution_time', $old_max_execution_time);
session_cache_limiter($old_cache_limiter);
// ----------------------------------------------------
// Downloading complete!
// Here you can update your table row in DB...
// ----------------------------------------------------
exit;
}