งงค่ะ มึนค่ะ รบกวนหน่อยค่ะ 1. คือว่าใช้ file field ในการ upload file ค่ะ

 if($edit){
		
	$where = " ".$field." ='$id_edit'";		
							  
	$sql_del_fiel = "select  *  from ".$table." where $where";
     	$result_del_file = mysql_query($sql_del_fiel);	
	$array_del_file = mysql_fetch_array($result_del_file);						
	$file_del = $dir_file."/".$array_del_file['file_upload'];	
		
	    if(!unlink($file_del)){			
		echo "ลบไฟล์ไม่ได้";	 exit();	
	    }
			 
		if($file_upload){
				
		    $files_tmp_name = $_FILES['file_upload']['tmp_name'];										
		    $files_upload = $_FILES['file_upload']['name'];																
						
					
		    $dir_upload ="../$dir_pro/$dir_file/".$files_upload; 	// ที่เก็บไฟล์
		    if(!move_uploaded_file($files_tmp_name,$dir_upload)){
			echo "upload ไม่ได้ $dir_upload";  exit;	
		    }
										
		}
	
		$sql_update = "update ".$table." set  subject_upload='$subject_upload' ,file_upload='$files_upload', detail_upload='$detail_upload' where  ".$field."='$id_edit'";