使用move_uploaded_file后tmp_name会消失吗?

我有这个页面，您可以在其中向多个人发送消息并将文件附加到其中......

这是我的代码

<?php
    session_start();
    $inboxfrom = $_SESSION['loginusername'];
    $inboxto = $_POST['inboxto'];
    $inboxsubject = $_POST['inboxsubject'];
    $inboxcontent = $_POST['inboxcontent'];
    $inboxtime = date('g:i A', time()+(6*60*60));
    $inboxdate = date('Y-m-d', time()+(6*60*60));
    mysql_connect("127.0.0.1", "root", "")or die("Cannot Connect toDb");
    mysql_select_db("Abbot_db");
    $count = 0;
    function generateRandomString($length = 8){    
        $string = ""; 
        $possible = "0123456789bcdfghjkmnpqrstvwxyz"; //character that can be used 
        for($i=0;$i < $length;$i++){ 
            $char = substr($possible, rand(0, strlen($possible)-1), 1); 
            if (!strstr($string, $char)){ 
                $string .= $char; 
            } 
        } 
        return $string; 
    } 
    if (count($inboxto) != 0){
        $count = 0;
        while ($count < count($inboxto)){
            $recepient = $_POST['inboxto'][$count];
            mysql_query("INSERT INTO Inbox_tbl(InboxTo, InboxFrom, InboxSubject, InboxContent, InboxTime, InboxDate,InboxStatus,ToDelete,FromDelete)VALUES ('$recepient','$inboxfrom','$inboxsubject','$inboxcontent','$inboxtime','$inboxdate','Unread','No','No')");
            $recepient_result = mysql_query("SELECT * FROM Accounts_tbl WHERE UserID='$recepient'");
            if (mysql_result($recepient_result, 0, "UserTypeID") == 1){
                $notiurl = "LMSadmin_inbox.php";
            } else if (mysql_result($recepient_result, 0, "UserTypeID") == 2) {
                $notiurl = "LMSteacher_inbox.php";
            } else {
                $notiurl = "LMSstud_inbox.php";
            }
            mysql_query("INSERT INTO Noti_tbl(NotiTo,NotiFrom,NotiContent,NotiDate,NotiTime,NotiType,NotiUrl)
                VALUES('$recepient','$inboxfrom','has sent you a message','$inboxdate','$inboxtime','Message','$notiurl')");

//---------------------------------------------------------         
            $countto = 0;
            $cont = generateRandomString(128);
            $folder = "./Attachments/".$cont;
            $name = $_FILES['file']['name'];
            if (!empty($name)){
                    while (is_dir($folder)){
                        $cont = generateRandomString(128);
                        $folder = "./Attachments/".$cont;
                    }   
                    mkdir($folder, 0700, true);
            }
            while ($countto < count($_FILES['file']['name'])){
                $name = $_FILES['file']['name'][$countto];
                $type = $_FILES['file']['type'][$countto];
                $tmp_name = $_FILES['file']['tmp_name'][$countto];
                $folder = "Attachments/".$cont."/";
                move_uploaded_file($tmp_name, $folder.$name);
                $fileurl = $cont."/".$name;
                $dummypost = mysql_query("SELECT * FROM Inbox_tbl ORDER BY InboxID DESC");
                $msgid = mysql_result($dummypost, 0, "InboxID");
                mysql_query("INSERT INTO Attachments_tbl(FileUrl,FileName,AttachType,AttachID)
                    VALUES('$fileurl','$name','Message',$msgid)");
                $countto++;
            }
//----------------------------------------------            

            $count++;   
        }
    }
    header('Location: ' . $_SERVER['HTTP_REFERER']);
?>

现在我放多个接收者和倍数后的结果是......第一个收件人将获得附件。这意味着附件文件夹将是随机生成的，文件将被放入其中。但是在下一个接收时，附件不会移动到各自的文件夹中。我可以看到文件夹已制作，但文件未移动。

我的问题是..使用"move_uploaded_file"代码后"temp_name"会消失吗？因为我认为这就是文件不移动的原因。所以你能建议我可以使用的任何替代代码吗？