function wo_down($file_dir,$file_name){
$file = @ fopen($file_dir . $file_name,"r");
if (!$file) {
echo "文件找不到";
} else {
header("content-type: application/octet-stream");
header("content-disposition: attachment; filename=" . $file_name);
while (!feof ($file)) {
echo fread($file,50000);
}
fclose ($file);
}
}
PHP下载功能代码(2)
原文：http://www.cnblogs.com/pengboyu/p/4497102.html
