php简单文件上传代码

<html>
<head>
<title>filemanage</title>
</head>
<body>
<center>
<p><h2>文件管理</h2></p><br>
<table border=1><tr size=18>
<td>文件ID</td><td>文件名称</td><td>文件大小</td><td>上传时间</td><td>下载</td><td>删除</td></tr>
<?php
include("conn.php");
//echo '<table border=1>';
$rs=$db->query("select * from filem order by f_id DESC");
$i=1;
while($row = $rs->fetch_assoc())
{
$size=$row['f_size']/1024;
echo "<tr><td>".$i++."</td><td>".$row['f_name']."</td><td>".number_format($size, 2, '.', '')."KB</td><td>".$row['f_date']."</td><td><a href=".$row['f_url']." target=_blank>下载</a></td><td><a href=del.php?id=".$row['f_id'].">删除</a></td></tr>";
}
echo '</table>';
unset($rs);
$db->close();
?>
</center>
<br><br><hr><br>
<b><h2>uploadfile</h2></b>
<br>
<form enctype="multipart/form-data" action="" method="post">
选择上传文件:<br><input name="userfile" type="file"><br>
<input type="submit" value="发送">
</form>
<?php
if(!$_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!<br>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($sql);
       echo "<script language='javascript'>location='index.php';</script>";
      }
   unset($rs);
   $db->close();

}
?>
</body>
</html>

补充：Php教程,Php常用代码