php - PDO query with session doesn't return anything -

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i'm starting learn pdo , while doing decided rewrite old mysql_* code. have login form according userlevel redirects different locations. done (i think since can login correctly). next when redirects me have query depending of userlevel show result database. problem doesn't return , there no errors in logfile. login. doing correctly?

session_start(); if(isset($_post['submit'])) { include 'misc/database.inc.php'; $pdo = database::connect();  $username=$_post['username'];  $password=sha1($_post['password']);       $stmt = $pdo->prepare("select * users username = :username , password = :password");      $stmt->bindparam(':username', $username);     $stmt->bindparam(':password', $password);      $stmt->execute();      $res  = $stmt -> fetch();  if ($res['userlevel'] == 1) {     // save type , other information in session future use.         $_session['username'] = $username;         $_session['password'] = $password;         $_session['userlevel'] = $userlevel;      header( "location: admins/main.php");    } elseif ( $res['userlevel'] >= 4 )  {         $_session['user_id'] = $id;          $_session['username'] = $username;         $_session['password'] = $password;         $_session['userlevel'] = $userlevel;         $_session['firstname'] = $firstname;         $_session['lastname'] = $lastname;         $_session['user_image'] = $user_image;         $_session['email'] = $email;             header('location: users/main.php'); } else  {     header("location: index.php"); } // closing mysql database connection  $pdo = null; } else {

and query want perform in main.php when login according userlevel

<?php include '../misc/database.inc.php'; $pdo = database::connect(); $q = "select * ras r      left join user_ras r2u on r.userlevel = r2u.ras_userlevel     left join users u on r2u.user_userlevel = u.userlevel menu = '".$_session['userlevel']."'";  foreach($pdo->query($q) $res) {     echo '<a href="users/ras.php?rest_id='. $res['ras_id'] .'">'.$res['name'].'</a>';   }  database::disconnect();  ?>

as said i'm new pdo please bear me , if can me. thank you.

update - database.inc.php

<?php class database { private static $dbname = 'dbname' ; private static $dbhost = 'localhost' ; private static $dbusername = 'user'; private static $dbuserpassword = 'pass';  private static $cont  = null;  public function __construct() {     die('init function not allowed'); }  public static function connect() {    // 1 connection through whole application    if ( null == self::$cont )    {          try     {       self::$cont =  new pdo( "mysql:host=".self::$dbhost.";"."dbname=".self::$dbname, self::$dbusername, self::$dbuserpassword);      }     catch(pdoexception $e)     {       die($e->getmessage());      }    }    return self::$cont; }  public static function disconnect() {     self::$cont = null; } } ?>

where variables defined assigning session $id, $userlevel, $firstname, $lastname, $user_image, $email ? undefined @ point:

    $_session['user_id']   = $id;      $_session['userlevel'] = $userlevel;     $_session['firstname'] = $firstname;     $_session['lastname']  = $lastname;     $_session['user_image']= $user_image;     $_session['email']     = $email;

i think need this

session_start(); if(isset($_post['submit'])) { include 'misc/database.inc.php'; $pdo = database::connect();  $username=$_post['username'];  $password=sha1($_post['password']);       $stmt = $pdo->prepare("select * users username = :username , password = :password");      $stmt->bindparam(':username', $username);     $stmt->bindparam(':password', $password);      $stmt->execute();      $res  = $stmt -> fetch();  if ($res['userlevel'] == 1) {     // save type , other information in session future use.         $_session['username'] = $username;         $_session['password'] = $password;         $_session['userlevel'] = $res['userlevel'];      header( "location: admins/main.php");    } elseif ( $res['userlevel'] >= 4 )  {         $_session['user_id']   = $res['id'];         $_session['username'] = $username;         $_session['password'] = $password;           $_session['userlevel'] = $res['userlevel'];         $_session['firstname'] = $res['firstname'];         $_session['lastname']  = $res['lastname'];         $_session['user_image']= $res['user_image'];         $_session['email']     = $res['email'];          header('location: users/main.php'); } else  {     header("location: index.php"); } }

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