如何在php网站上创建管理员登录？

我的注册页面和登录表单工作正常.如果任何成员注册然后登录,用户来到member.php页面.会员页面有他们的个人资料信息,仅供会员使用.现在我想创建一个管理员登录,管理员将重定向到admin.php页面.此页面包含所有信息
喜欢：
关于有多少用户注册(完成)
所有其他管理任务(完成)

我已经完成了我的管理页面,但我不知道如何授权管理员登录和密码,如果我使用它然后它将带我到管理区域.

这是我的登录表单代码

<form id="loginForm" name="loginForm" method="post" action="login-exec.php">
  <table width="700" border="0" align="center" cellpadding="2" cellspacing="0">
    <tr>
      <td width="112"><b>User id (Email-id)</b></td>
      <td width="188"><input name="user_email" type="text" class="textfield" id="login" /></td>
    </tr>
    <tr>
      <td><b>Password</b></td>
      <td><input name="password" type="password" class="textfield" id="password" /></td>
    </tr>
    <tr>
      <td> </td>
      <td><input type="submit" name="Submit" value="Login" /></td>
    </tr>
  </table>
</form>
</body>
</html>

login-exec.php的代码

<?php
    //Start session
    session_start();

    //Include database connection details
    require_once('config.php');

    //Array to store validation errors
    $errmsg_arr = array();

    //Validation error flag
    $errflag = false;

    //Connect to mysql server



    //Select database
    ----something----

    //Function to sanitize values received from the form. Prevents SQL injection
    function clean($str) {
        $str = @trim($str);
        if(get_magic_quotes_gpc()) {
            $str = stripslashes($str);
        }
        return mysql_real_escape_string($str);
    }

    //Sanitize the POST values
    $user_email = clean($_POST['user_email']);
    $pwd = clean($_POST['password']);

    //Input Validations
    if($user_email == '') {
        $errmsg_arr[] = 'Login ID missing';
        $errflag = true;
    }
    if($pwd == '') {
        $errmsg_arr[] = 'Password missing';
        $errflag = true;
    }

    //If there are input validations,redirect back to the login form
    if($errflag) {
        $_SESSION['ERRMSG_ARR'] = $errmsg_arr;
        session_write_close();
        header("location: login-form.php");
        exit();
    }

    //Create query
    $qry="SELECT * FROM customer WHERE user_email='$user_email' AND password='$pwd' ";

    if ($user_email= )

    $result=mysql_query($qry);

    //Check whether the query was successful or not
    if($result) {
        if(mysql_num_rows($result) == 1) {
            //Login Successful
            session_regenerate_id();
            $customer = mysql_fetch_assoc($result);
            $_SESSION['SESS_id'] = $customer['id'];
            $_SESSION['SESS_fname'] = $customer['first_name'];
            $_SESSION['SESS_lname'] = $customer['last_name'];
            session_write_close();
            header("location: member-index.php");
            exit();
        }else {
            //Login failed
            header("location: login-failed.php");
            exit();
        }
    }else {
        die("Query failed");
    }
?>