<form name="form1" method="post" action="admin_upfile.PHP" enctype="multipart/form-data">
<input type="file" name="pic">
<input type="submit" name="Submit" value="开始上传" class="button">
</form>

/**
 * 上传图片客户端和服务器端代码演示
 *
 * @param 
 * @arrange 网： jb51.cc
 **/
//这里上传 $upsize判断上传文件的大小
$uppath = "/attached/"; //文件上传路径
//转换根目录的路径
if (strpos($uppath,"/") == 0)
{
 $i = 0;
 $thpath = $_SERVER["SCRIPT_NAME"];
 $thpath = substr($thpath,1,strlen($thpath));
 while (strripos($thpath,"/") !== false)
 {
  $thpath = substr($thpath,strpos($thpath,"/") + 1,strlen($thpath));
  $i = ++$i;
 }
 $pp = "";
 for ($j = 0; $j < $i; ++$j)
 {
  $pp .= "../";
 }
 $uppaths = $pp . substr($uppath,strlen($thpath));
}
$filename = date("y-m-d");
if (is_dir($uppaths . $filename) != TRUE)
 mkdir($uppaths . $filename,0777);
$f = $_FILES['pic'];
if ($f["type"] != "image/gif" && $f["type"] != "image/pjpeg" && $f["type"] != "image/jpeg" && $f["type"] != "image/x-png")
{
 echo "<script>alert('只能上传图片格式的文件');window.close()</script>";
 return false;
}
//获得文件扩展名
$temp_arr = explode(".",$f["name"]);
$file_ext = array_pop($temp_arr);
$file_ext = trim($file_ext);
$file_ext = strtolower($file_ext);
//新文件名
$new_file_name = md5(date("YmdHis")) . '.' . $file_ext;
echo $dest = $uppaths . $filename . "/" . date("ymdhis") . "_" . $new_file_name; //设置文件名为日期加上文件名避免重复 上传目录
echo $dest1 = $uppath . $filename . "/" . date("ymdhis") . "_" . $new_file_name; //设置文件名为日期加上文件名避免重复
$r = move_uploaded_file($f['tmp_name'],$dest);

/***   来自编程之家 jb51.cc（jb51.cc）   ***/