PHP手册( 搜索readfile词条)
+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
Example #1 Forcing a download using readfile()
<?php
$file = 'monkey.gif';
if (file_exists($file)) {
header('Content-Description: File Transfer');
header('Content-Type: application/octet-stream');
header('Content-Disposition: attachment; filename='.basename($file));
header('Content-Transfer-Encoding: binary');
header('Expires: 0');
header('Cache-Control: must-revalidate');
header('Pragma: public');
header('Content-Length: ' . filesize($file));
ob_clean();
flush();
readfile($file);
exit;
}
?>
+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
If you want to force a download:
<?php
$file = '/var/www/html/file-to-download.xyz';
header('Content-Description: File Transfer');
header('Content-Type: application/force-download');
header('Content-Length: ' . filesize($file));
header('Content-Disposition: attachment; filename=' . basename($file));
readfile($file);
?>
+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
readfile with accurate limit rate, using pv linux command
<?php
$file = $_SERVER['QUERY_STRING'];
header("Content-length: ".filesize($file));
header("Content-type: ".mime_content_type($file));
readfileLimit($file);
function readfileLimit($file, $limit='10M')
{
$f = popen("pv -L $limit '$file'",'r') or return false;
while(!feof($f))
{
echo fread($f, 1024);
flush();
}
fclose($f);
}
?>
——————————————————————————————————
我的例子（解决ie下中文文件名乱码问题）
<?php
$filename = $_GET['filename'];
$file = './download/'.$filename;
$rename = ($_GET['rename']=="") ? $filename : $_GET['rename'];
header('Content-Type: application/force-download');
header("Content-Type: application/octet-stream");
header('Content-Length: ' . filesize($file));
$ua = $_SERVER["HTTP_USER_AGENT"]; //判断浏览器类型
if (preg_match("/MSIE/", $ua)) {
$rename = iconv("gb2312","UTF-8",$rename);
$encoded_filename = urlencode($rename);
$encoded_filename = str_replace("+", " ", $encoded_filename);
header('Content-Disposition: attachment; filename="' . $encoded_filename . '"');
} else if (preg_match("/Firefox/", $ua)) {
header('Content-Disposition: attachment; filename*="utf8\'\'' . $rename . '"');
} else {
header('Content-Disposition: attachment; filename="' . $rename . '"');
}
readfile($file);
exit;
?>
