จะทำการตรวจสอบอย่างไรให้ save ไฟล์รูปเฉพาะที่เป็นภาษาอังกฤษหรือตัวเลขค่ะ

$fileupload = $_FILES['filUpload']['tmp_name'];
$fileType = $_FILES["filUpload"]["type"];
if(($fileType=="image/gif") || ($fileType=="image/jpeg") || ($fileType == "image/pjpeg") or $fileType == "")
{
		//*** Update Record ***//
		$strSQL = "UPDATE tblcatalogue_store ";
		$strSQL .=" SET name_before_photo1 = '".$_POST["txtName"]."' WHERE id_catalogue_store= '".$_GET["id_catalogue_store"]."' ";
		$objQuery = mysql_query($strSQL);		
	
	if($_FILES["filUpload"]["name"] != "" )
	{
		if(copy($_FILES["filUpload"]["tmp_name"],"photo/".$_FILES["filUpload"]["name"]))
		{

			//*** Delete Old File ***//			
			@unlink("photo/".$_POST["hdnOldFile"]);
			
			//*** Update New File ***//
			$strSQL = "UPDATE tblcatalogue_store ";
			$strSQL .=" SET before_photo1 = '".$_FILES["filUpload"]["name"]."' WHERE id_catalogue_store  = '".$_GET["id_catalogue_store"]."' ";
			$objQuery = mysql_query($strSQL);		

			?>
            <tr>
         					<td  bgcolor="#33FFFF"  colspan="2" align="center"><font color="#000000"  size="5"  face="Arial, Helvetica, sans-serif">แก้ไขเรียบร้อยแล้ว</font></td>
            </tr>
            <?
		}
	}
}