Fileupload - 添加随机名称并设置max-size，怎么做？

Question

Hi,

Today I have a file upload script. The problem is that it does not rename file names, and has a maximum file upload size.

How can I add this to my current script?

$Filename=$_POST['Filename'];
$Name=$_POST['Name'];
$pic=($_FILES['Filename']['name']);


if (isset($_POST['save']) && !empty($_POST['Name']) && !empty($_POST['Category']) && !empty($_POST['Time'])){
        $sql = "INSERT INTO View SET MergeID='{$_GET['id']}', Name='{$_POST['Name']}', Category='{$_POST['Category']}', Media='$pic', Time='{$_POST['Time']}'";
        mysql_query($sql) or die(mysql_error());
GetFileUpload();

}




function GetFileUpload() {

    if (file_exists("Media/" . $_FILES["Filename"]["name"])) {
       echo $_FILES["Filename"]["name"] . " file already exist ";
    } else {
       move_uploaded_file($_FILES["Filename"]["tmp_name"], "Media/" . $_FILES["Filename"]["name"]);
        // echo "File: ". basename( $_FILES['Filename']['name']). " has been created.";
    }

}

Answer 1

if ($_FILES["Filename"]["size"] < 2000000)
  {
  if ($_FILES["Filename"]["error"] > 0)
    {
   echo "Return Code: " . $_FILES["Filename"]["error"] . "<br>";
    }
  else
    {
$rand =rand(1000,9999);
$fname=$rand."-".$_FILES["Filename"]["name"];
   move_uploaded_file($_FILES["Filename"]["tmp_name"], "Media/" .$rand );
}