注意事項(xiàng)：1.不能用ajax請(qǐng)求 可以用window.location.href()等傳過來
//文件下載
function download(){
????????//$filename文件所在路徑
????????$filename = I('filename');
????????//下載時(shí)顯示的文件名
????????$name = I('name');
????????if($filename){
????????????????//下載時(shí)顯示的文件名
????????????header('content-disposition:attachment;filename='.basename($name));
????????????header('content-length:'.filesize($filename));
????????????readfile($filename);
????????}
}
