แก้ไข form ที่มี input type="file"(รูปภาพ) พอแก้แค่พวก "text" แต่จะไม่เปลี่ยนรูปภาพ กดอัพเดต ส่วนที่แก้ก็แก้ตาม แต่รูปหาย ไม่เป็นรูปเดิม

<form method="post" name="form1" action="<?php echo $editFormAction; ?>" enctype="multipart/form-data">
  <table align="center">
    <tr valign="baseline">
      <td nowrap align="right">Id:</td>
      <td><?php echo $row_updatestrategyrcs['id']; ?></td>
    </tr>
    <tr valign="baseline">
      <td nowrap align="right">Strategy_img:</td>
      <td><input type="file" name="strategy_img" value="./imgupload/<?php echo htmlentities($row_updatestrategyrcs['strategy_img'], ENT_COMPAT, 'utf-8'); ?>" size="32">
      <input type="file" id="strategy_img" name="strategy_img" size="32">
      <input type="hidden" id="strategy_img" name="strategy_img" value="<?php echo htmlentities($row_updatestrategyrcs['strategy_img'], ENT_COMPAT, 'utf-8'); ?>" size="32">
      </td>
    </tr>
    <tr valign="baseline">
      <td nowrap align="right">Strategy_cap:</td>
      <td><input type="text" name="strategy_cap" value="<?php echo htmlentities($row_updatestrategyrcs['strategy_cap'], ENT_COMPAT, 'utf-8'); ?>" size="32"></td>
    </tr>
    <tr valign="baseline">
      <td nowrap align="right">Strategy_file:</td>
      <td><input type="file" name="strategy_file" value="<?php echo htmlentities($row_updatestrategyrcs['strategy_file'], ENT_COMPAT, 'utf-8'); ?>" size="32"></td>
    </tr>
    <tr valign="baseline">
      <td nowrap align="right">Strategy_link:</td>
      <td><input type="text" name="strategy_link" value="<?php echo htmlentities($row_updatestrategyrcs['strategy_link'], ENT_COMPAT, 'utf-8'); ?>" size="32"></td>
    </tr>
    <tr valign="baseline">
      <td nowrap align="right">&nbsp;</td>
      <td><input type="submit" value="Update record"></td>
    </tr>
  </table>
  <input type="hidden" name="MM_update" value="form1">
  <input type="hidden" name="id" value="<?php echo $row_updatestrategyrcs['id']; ?>">
</form>

<?php require_once('../Connections/myconnection.php'); ?>
<?php include("upload.php"); ?>
<?php
if (!function_exists("GetSQLValueString")) {
function GetSQLValueString($theValue, $theType, $theDefinedValue = "", $theNotDefinedValue = "") 
{
  if (PHP_VERSION < 6) {
    $theValue = get_magic_quotes_gpc() ? stripslashes($theValue) : $theValue;
  }

  $theValue = function_exists("mysql_real_escape_string") ? mysql_real_escape_string($theValue) : mysql_escape_string($theValue);

  switch ($theType) {
    case "text":
      $theValue = ($theValue != "") ? "'" . $theValue . "'" : "NULL";
      break;    
    case "long":
    case "int":
      $theValue = ($theValue != "") ? intval($theValue) : "NULL";
      break;
    case "double":
      $theValue = ($theValue != "") ? doubleval($theValue) : "NULL";
      break;
    case "date":
      $theValue = ($theValue != "") ? "'" . $theValue . "'" : "NULL";
      break;
    case "defined":
      $theValue = ($theValue != "") ? $theDefinedValue : $theNotDefinedValue;
      break;
  }
  return $theValue;
}
}

$editFormAction = $_SERVER['PHP_SELF'];
if (isset($_SERVER['QUERY_STRING'])) {
  $editFormAction .= "?" . htmlentities($_SERVER['QUERY_STRING']);
}

#--------- Get Data ----------#
$colname_updatestrategyrcs = "-1";
if (isset($_GET['strategyid'])) {
  $colname_updatestrategyrcs = $_GET['strategyid'];
}
mysql_select_db($database_myconnection, $myconnection);
$query_updatestrategyrcs = sprintf("SELECT * FROM strategy WHERE id = %s", GetSQLValueString($colname_updatestrategyrcs, "int"));
$updatestrategyrcs = mysql_query($query_updatestrategyrcs, $myconnection) or die(mysql_error());
$row_updatestrategyrcs = mysql_fetch_assoc($updatestrategyrcs);
$totalRows_updatestrategyrcs = mysql_num_rows($updatestrategyrcs);

mysql_free_result($updatestrategyrcs);
#---------// End Get Data ----------#

#--------- Update Data ----------#
if ((isset($_POST["MM_update"])) && ($_POST["MM_update"] == "form1")) {

    #----------แก้ไขตรงนี้----------#
    $image  = ! empty($_FILES['strategy_img']['name']) ? Upload($_FILES['strategy_img']) : htmlentities($row_updatestrategyrcs['strategy_img'], ENT_COMPAT, 'utf-8');
    $files  = ! empty($_FILES['strategy_file']['name']) ? Uploadfile($_FILES['strategy_file']) : htmlentities($row_updatestrategyrcs['strategy_file'], ENT_COMPAT, 'utf-8');

    $updateSQL = sprintf("UPDATE strategy SET strategy_img=%s, strategy_cap=%s, strategy_file=%s, strategy_link=%s WHERE id=%s",
                            GetSQLValueString($image, "text"),
                            GetSQLValueString($_POST['strategy_cap'], "text"),
                            GetSQLValueString($files, "text"),
                            GetSQLValueString($_POST['strategy_link'], "text"),
                            GetSQLValueString($_POST['id'], "int")
                        );
    
    #----------// จบแก้ไขตรงนี้ ----------#

  mysql_select_db($database_myconnection, $myconnection);
  $Result1 = mysql_query($updateSQL, $myconnection) or die(mysql_error());

  $updateGoTo = "#";
  if (isset($_SERVER['QUERY_STRING'])) {
    $updateGoTo .= (strpos($updateGoTo, '?')) ? "&" : "?";
    $updateGoTo .= $_SERVER['QUERY_STRING'];
  }
  header(sprintf("Location: %s", $updateGoTo));
}
#---------// End Update Data ----------#
?>

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<meta charset="UTF-8">
<title>edit</title>
</head>
<body  onunload="opener.location=('for_admin.php')">
<form method="post" name="form1" action="<?php echo $editFormAction; ?>" enctype="multipart/form-data">
  <table align="center">
    <tr valign="baseline">
      <td nowrap align="right">Id:</td>
      <td><?php echo $row_updatestrategyrcs['id']; ?></td>
    </tr>
    <tr valign="baseline">
      <td nowrap align="right">Strategy_img:</td>
      <td><input type="file" name="strategy_img" value="<?php echo htmlentities($row_updatestrategyrcs['strategy_img'], ENT_COMPAT, 'utf-8'); ?>" size="32"></td>
    </tr>
    <tr valign="baseline">
      <td nowrap align="right">Strategy_cap:</td>
      <td><input type="text" name="strategy_cap" value="<?php echo htmlentities($row_updatestrategyrcs['strategy_cap'], ENT_COMPAT, 'utf-8'); ?>" size="32"></td>
    </tr>
    <tr valign="baseline">
      <td nowrap align="right">Strategy_file:</td>
      <td><input type="file" name="strategy_file" value="<?php echo htmlentities($row_updatestrategyrcs['strategy_file'], ENT_COMPAT, 'utf-8'); ?>" size="32"></td>
    </tr>
    <tr valign="baseline">
      <td nowrap align="right">Strategy_link:</td>
      <td><input type="text" name="strategy_link" value="<?php echo htmlentities($row_updatestrategyrcs['strategy_link'], ENT_COMPAT, 'utf-8'); ?>" size="32"></td>
    </tr>
    <tr valign="baseline">
      <td nowrap align="right">&nbsp;</td>
      <td><input type="submit" value="Update record"></td>
    </tr>
  </table>
  <input type="hidden" name="MM_update" value="form1">
  <input type="hidden" name="id" value="<?php echo $row_updatestrategyrcs['id']; ?>">
</form>
</body>
</html>