uploadfile

if(!$_FILES["userfile"]["name"]) exit;
//echo $_FILES['userfile']['type'];
if ($_FILES['userfile']['error'] > 0)
{
echo 'Problem: ';
switch ($_FILES['userfile']['error'])
{
case 1: echo 'File exceeded upload_max_filesize'; break;
case 2: echo '不能超过800M'; break;
case 3: echo 'File only partially uploaded'; break;
case 4: echo 'No file uploaded'; break;
}
exit;
}
else
{ //检查上传文件是否在允许上传的类型
$tp = array("gif","jpeg","png","txt","doc","rar","zip","xls","bmp","wmv","mp3","flv","rmvb","avi");
if (!in_array(strtolower(substr(strrchr($_FILES['userfile']['name'], '.'),1)), $tp))

{
echo '文件类型错误，请重新选择文件!
只允许rar,zip,jpg,gif,txt,png,bmp,xls类型的文件';
exit;
}

$path="./file/"; //上传路径

if(file_exists($path.$_FILES['userfile']['name'])) //判断文件是否存在
{
echo '文件已存在，请更改后重新上传!';
exit;
}

if($_FILES["userfile"]["name"])
{
$file1=$_FILES["userfile"]["name"];
$file2 = $path.$file1;
$flag=1;
}
if($flag)
$result=move_uploaded_file($_FILES["userfile"]["tmp_name"],$file2);
//特别注意这里传递给move_uploaded_file的第一个参数为上传到服务器上的临时文件
if($result)
{

$time=date("Y-m-d");
// $url=$patch.$name;
$size=$_FILES["userfile"]["size"];
include("conn.php");
$rs=$db->query("insert into filem(f_name,f_url,f_date,f_size) values('$file1','$file2','$time','$size')");
// $rs=$db->query($sql);
echo "";
}
unset($rs);
$db->close();