Here's a code:
 <?php
    require_once('./includes/connection.inc.php');
    session_start();
    // create database connection
    $connread = dbConnect('read', 'pdo');
    $connwrite = dbConnect('write', 'pdo');
    $komentari = 'SELECT * FROM komentariodobreni ORDER by komentarodobren_id DESC';
    $kontakt = 'SELECT poruka_id, ime, prezime, email, predmet, ordinacija, poruka,      DATE_FORMAT(datum, "%H:%i:%s %d. %b. %Y") 
     AS datum  FROM kontakt ORDER by poruka_id DESC';
    if (isset($_POST['slanje'])) {
    $potvrdiquery = "SELECT * FROM kontrola WHERE adminname='" . $_POST["adminname"] . "' and adminpassword = '". $_POST["adminpassword"]."'";
     $stmt = $connwrite->prepare($potvrdiquery )
    ;
      // bind the parameters and execute the statement  
      // execute and get number of affected rows
      $stmt->execute();
      $OK = $stmt->rowCount();
    foreach ($connread->query($potvrdiquery) as $row) {
    $_SESSION['adminid'] = $row['adminid'];
    $_SESSION["adminname"] = $row["adminname"];
    $_SESSION["adminpassword"] = $row["adminpassword"];
    } 
     header('Location: index.php');
    } 
?>
It works perfectly on my local, but when I upload it to Ipage or some other server it doesn't register session variables.
 
     
     
     
    