php - Bind array into select query -

i try bind array of values in case $ownco in select query wont work. how can realize it, values becomes checked/passed in second query?

<?php  $hostname = 'localhost'; $user = 'root'; $password = ''; $username = $_cookie['username']; try {     $dbh = new pdo("mysql:host=$hostname;dbname=searchfood", $user, $password);      $dbh->setattribute(pdo::attr_errmode, pdo::errmode_exception); // <== add line     $sql = "select id_post             comments              username = $username             order id desc"; // oder (longitude between $loo , $lo or latitude  between $laa , $la) versuchen     if ($res = $dbh->query($sql)) {// need add line in code         // after fetchcolumn         $ownco = $res->fetchall();     } } catch (pdoexception $e) {     echo $e->getmessage(); }  $userid = $_cookie['userid']; try {     $dbh = new pdo("mysql:host=$hostname;dbname=searchfood", $user, $password);      $dbh->setattribute(pdo::attr_errmode, pdo::errmode_exception); // <== add line     $sql = "select id, autorid, autor, date, longitude, latitude, title, text, town, time             posts              id = $ownco             order id desc"; // oder (longitude between $loo , $lo or latitude  between $laa , $la) versuchen     if ($res = $dbh->query($sql)) {// need add line in code         // after fetchcolumn         $resultcom = $res->fetchall();     } } catch (pdoexception $e) {     echo $e->getmessage(); } ?> 

there several problems question.

• first of all, accepted the answer doesn't answer it. cheating on rules?
• second, first query never work, due wrong sql syntax , lack of prepared statements.
• third, $ownco doesn't contain data structure expect.
• fourth, bind array pdo quite simple question, explained in many answers , in pdo tag wiki.
• fifth, don't need second query @ all. instead have use join in first query.