问如何将图片从文件夹保存到数据库

EN

$result=$db->query("SELECT * FROM Table WHERE id='2' ");
while($row = $result->fetch_array())  {
$id=$row["id"]; 
$URL=$row["URL"]; 
}

$files_name = "folder/$URL";

#$files_name = "folder/img.jpg";

$fileSize = filesize($files_name);
$fType = filetype($files_name);
$fileName=$id;

$content = fread($fileSize);
$content = addslashes($content);
fclose($fp);

$Update ="UPDATE Table SET name_file='$fileName',size='$fileSize',type='$fType',content='$content' WHERE id='$id'";
$Up_ok = $db->query ($Update);