实现文件下载功能PHP代码片断-PHP源码

偶尔用用PHP写点这种很小很小的Web程序，还是蛮简单方便的。

PHP实现文件下载功能的代码如下

$base_dir = "/usr/share/nginx/html/";
$myfile = $base_dir . $_GET["file"];
//echo $myfile;

if( ! file_exists($myfile) ) {
echo "file: " . $myfile . " doesn't exist.";
} elseif ( is_dir($myfile) ) {
echo "file: " . $myfile . " is a directory.";
} else {
header("Content-type: application/octet-stream");
header('Content-Disposition: attachment; filename="' . basename($myfile) . '"');
header("Content-Length: ". filesize($myfile));
readfile($myfile);
}
?>

github: https://github.com/smilejay/other-code/blob/master/php/download.php

另外，一个牛人分析一下使用apache/nginx的一些模块让php实现问下下载更加的高效：

http://www.laruence.com/2012/05/02/2613.html