php - Session variables and Header not working -


i'm not sure doing wrong. i've created login systems before, in case neither session variables being passed nor page being redirected. code not returning errors either. 

if(isset($_post['login'])){  $get_pass = $_post['password']; $get_pass_md5 = md5(md5("kjklad&%12!!".$get_pass."dafkdkdf^9131*@^")); $get_email = $_post['email'];  require('connect.php');  $confirm_email_query = $con->query("select * users email = '$get_email'");  if($confirm_email_query->rowcount() == 1){      $db_user_info = $confirm_email_query->fetch(pdo::fetch_obj);     $db_password = $db_user_info->password;      if($db_password === $get_pass_md5){           $fname = $db_user_info->fname;         $lname = $db_user_info->lname;         $team_id = $db_user_info->team_id;         $user_id = $db_user_info->user_id;         $privilege = $db_user_info->privilege;          session_start();         session_id(md5(md5($team_id.$fname.$lname)));         $_session['team_id'] = $team_id;         $_session['fname'] = $fname;         $_session['lname'] = $lname;          $_session['user_id'] = $user_id;         $_session['privilege'] = $privilege;          header( 'location: index.php' ) ;      }     else{         echo "fatal error: have entered incorrect password.";     }   } else{     echo "fatal error: no such user exists."; } }

set session_start() @ 1st line code or including include() must 1st line verify encoding if utf-8 ansii or other if don't have include files within diferent encoding


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