โค๊ดอัพโหลดรูปครับ จะปรับเปลี่ยนตอนอัพให้มันเปลี่ยนชื่อตามที่เราตั้ง ได้อย่างไรครับ

<?php
require_once('class/class.upload.php') ;
 
$hostname_connection = "localhost";
$database_connection = "db_test";
$username_connection = "root";
$password_connection = "";
$connection = mysql_pconnect($hostname_connection, $username_connection, $password_connection)
		or trigger_error(mysql_error(),E_USER_ERROR); 
mysql_query( "SET NAMES UTF8" ) ;
 

if ((isset($_POST["MM_insert"])) && ($_POST["MM_insert"] == "form1")) {
 

    $upload_image = new upload($_FILES['image_name']) ; 
 
    if ( $upload_image->uploaded ) {
        $upload_image->image_resize         = true ; 
        $upload_image->image_x              = 400 ; 
        $upload_image->image_ratio_y        = true; 
 
        $upload_image->process( "upload_images" );  
    
        if ( $upload_image->processed ) {
 
            $image_name =  $upload_image->file_dst_name ; 
            $upload_image->clean();  
           

            $insertSQL = sprintf("INSERT INTO tbl_image (image_name) VALUES ( '%s' )", $image_name );
            echo $insertSQL ;
            mysql_select_db($database_connection, $connection);
            $Result1 = mysql_query($insertSQL, $connection) or die(mysql_error());
 
 
        }
 
    } 
 
}
?>