保留选择选项值下拉列表的会话

Question

您好我在登录时有一个选择选项，但我的选择值无法保持会话。我的代码有什么问题吗？请查看下面的参考代码。

我的form.php 我设置的选项值不适用于会话，但我的用户名可以保存会话

<form name=frmTest id="form" class="form-signin" action="check.php" method="post">
    <div class="append-icon">
        <input type="text" name="username" id="user" class="form-control form-white username" placeholder="Username" required>
        <i class="icon-user"></i>
    </div>
    <div class="append-icon m-b-20">
        <input type="password" name="password" id="pass" class="form-control form-white password" placeholder="Password" required>
        <i class="icon-lock"></i>
        <center>
          <select name=branch class="form-control form-white username" id="branch">
          <option selected> Select Branch </option>
          <option value='North'> North </option>
          <option value='South'> South </option>
          <option value='East'>  East </option>

        </select>
      </center>
    </div>
    <button type="submit" id="submit-form" class="btn btn-lg btn-danger btn-block ladda-button" data-style="expand-left">Sign In</button>
    <p>


</form>

我的check.php 我插入用户名和分支，所以我可以获得两个会话，但我只能从用户名

获得会话

<?php

include 'functions.php';
include 'database/connect.php';

session_start();

$user   =   $_POST['username'];
$branch =   $_POST['branch'];

$rem = false;

if($load = $con->prepare("select * from login where username = ?")){
    $load->bind_param("s", $user);
    $load->execute();
    $load->store_result();
    $number = $load->num_rows;
    $load->close();
}

if($number === 0){
    echo 'Login failed';
    exit();
}else{
    if($active = $con->prepare("select active from login where username = ?")){
        $active->bind_param("s", $user);
        $active->execute();
        $active->bind_result($res);
        $active->fetch();
    }

    if($res === 0){
        $_SESSION['user'] = $user;
        echo 'Success';
    }else{
        echo 'User not activated';
    }
}
?>

我的header.php和我在header.php

中包含了这个

<?php
session_start();
include '../login/functions.php';
include '../login/database/connect.php';
protect();
if(isset($_SESSION['user']))
    echo $_SESSION['user'];

else if(isset($_COOKIE['user']))
    echo $_COOKIE['user'];

$user = $_SESSION['user'];
$branch = $_SESSION['branch'];
?>