PHP, besoin d'un petit cout de pouce

SELECT * FROM News WHERE id=(SELECT id FROM News WHERE id<$id ORDER BY id DESC LIMIT 1) OR id>=$id ORDER BY id DESC LIMIT 3

$q=" SELECT * FROM $tbl_news WHERE id=(SELECT id FROM $tbl_news WHERE id>$id_article ORDER BY id DESC LIMIT 1) OR id<=$id_article ORDER BY id DESC LIMIT 3";

SELECT * 
FROM News
WHERE 
  id=(SELECT id FROM News WHERE id <$id_article ORDER BY id DESC LIMIT 1) OR
  id=(SELECT id FROM News WHERE id =$id_article LIMIT 1) OR
  id=(SELECT id FROM News WHERE id >$id_article ORDER BY id LIMIT 1)
ORDER BY id
LIMIT 3;

$result = mysql_query('');
while($row = mysql_fetch_assoc($result))
{
    if($row['id']<$id_article)
    {
        $news_prec['id'] = $row['id'];
        // etc.
    }
    elseif($row['id']=$id_article)
    {
        $news_cour['id'] = $row['id'];
        // etc.
    }
    else
    {
        $news_suiv['id'] = $row['id'];
        // etc.
    }
}

$q=" SELECT * FROM $tbl_news WHERE id= $id_article LIMIT 1";
$reqd = mysql_query($q);
$nb_art = mysql_num_rows($reqd);

$q=" SELECT * FROM $tbl_news WHERE id < $id_article ORDER BY id DESC LIMIT 1";
$reqd = mysql_query($q);
$news_avant = mysql_fetch_assoc($reqd);
$news_prec_nb = mysql_num_rows($reqd);

$q=" SELECT * FROM $tbl_news WHERE id > $id_article LIMIT 1";
$reqd = mysql_query($q);
$news_apres = mysql_fetch_assoc($reqd);
$news_suiv_nb = mysql_num_rows($reqd);

....

if ($news_prec_nb !=0){
//afficher news précédente
}
if ($news_suiv_nb !=0){
//afficher news suivante
}