php简单强制下载
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<?php
header("Content-Type: application/force-download");
header("Content-Disposition: attachment; filename=ins.jpg");
readfile("imgs/test_Zoom.jpg");
?>
第一行代码是强制下载；
第二行代码是给下载的内容指定一个名字；
第三行代码是把下载的内容读进文件中。
Example #1 Forcing a download using readfile()
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<?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($file));
header('Content-Transfer-Encoding: binary');
header('Expires: 0');
header('Cache-Control: must-revalidate, post-check=0, pre-check=0');
header('Pragma: public');
header('Content-Length: '. filesize($file));
ob_clean();
flush();
readfile($file);
exit;
}
?>
http://www.php.net/manual/en/function.readfile.php
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