Je n'arrive a mettre ce code en php pdo

Bonjour, je veux traduire en php pdo

$z =mysql_query('select codezone from localisation where id_localisation="'.$id_localisation.'" '); while($dnn = mysql_fetch_array($z)){ $dn2 = mysql_num_rows(mysql_query('select num_pdv from pdv ')); $n =$dn2+1; $idpdv=mysql_real_escape_string($dnn['codezone'].$n);