header("Content-type: text/html; charset=utf-8");// 创建数据库连接$con = mysql_connect('localhost', 'root', 'root') or die('Could not connect: ' . mysql_error());//echo 'Connected successfully';$db=mysql_select_db('download',$con);if (!$db){　　die ("Can\'t use download : " . mysql_error());}else{　　// 将用户信息插入数据库的user表   $sql = "SELECT * FROM `f_detail` WHERE `id` ='".$_GET['id']."' LIMIT 0 , 30";   $result = mysql_query($sql,$con);   $row=mysql_fetch_row($result);   if (!$result) {       // 释放结果集       mysql_free_result($result);       // 关闭连接       mysql_close($db);       echo '数据记录插入失败!';       exit;  } }//下载文件名//$file_name = "xxx.rar";$file_name = $row[1]; //var_dump($file_name);//下载文件存放目录$file_dir = "up/"; //检查文件是否存在if (!file_exists($file_dir . $file_name)) {     echo "文件找不到";     exit; }else {     // 打开文件    $file = fopen($file_dir . $file_name,"r");      // 输入文件标签     Header("Content-type: application/octet-stream");     Header("Accept-Ranges: bytes");     Header("Accept-Length: ".filesize($file_dir . $file_name));     Header("Content-Disposition: attachment; filename=" . $file_name);     // 输出文件内容     //读取文件内容并直接输出到浏览器    echo fread($file,filesize($file_dir . $file_name));     fclose($file);     exit;}

数据库

CREATE TABLE `f_detail` (  `id` int(11) NOT NULL auto_increment,  `filename` varchar(100) NOT NULL,  `des` varchar(64) NOT NULL,  `fsize` varchar(10) NOT NULL,  `ftype` varchar(100) NOT NULL,  `utime` datetime NOT NULL,  PRIMARY KEY  (`id`)) ENGINE=MyISAM  DEFAULT CHARSET=utf8 AUTO_INCREMENT=9 ;