Admin and User log in from two different tables - php

Question

I was wondering if anyone could help me - I have successfully created a log in system allowing a user (student) to log in. My system also requires an admin log in, with the admin having privileges to view pages that the student does not. Both the admin and student information comes from two different tables. Below is the code I have used for the student log in (there are two different pages - users and login). I am stuck as to how to implement the admin log in. Any help is appreciated!
(Admin will log in using 'adminnum' and 'adminpassword'.
login.php
<?php
include "core/init.php";
include "includes/content.php";
if (empty($_POST) === false) {
$studentemail = $_POST ['studentemail'];
$studentpassword = $_POST ['studentpassword'];
if (empty($studentemail) === true || empty($studentpassword) === true) {
$errors[] = "You need to enter an email address and password";
} else if (user_exists($studentemail) === false) {
$errors[] = "We can't find that email address. Have you registered?";
} else {
if (strlen($studentpassword) > 32) {
$errors[] = 'Password too long';
}
$login = login($studentemail, $studentpassword);
if ($login === false) {
$errors[] = 'That email/password combination is incorrect';
} else {
$_SESSION['studentid'] = $login;
header('Location: index.php');
exit();
}
}
} else {
$errors[] = 'No data received';
}
include "includes/overall/overall_header.php";
if (empty($errors) === false) {
?>
<h2> We tried to log you in, but...</h2>
<?php
echo output_errors($errors);
}
?>
<center><input id="submit" type="submit" value="Back" onclick="location.href='Login2.php'"></center>
<?php
include "includes/overall/overall_footerloggedout.php";
?>
users.php
<?php
function logged_in() {
return (isset($_SESSION['studentid'])) ? true : false;
}
function user_exists($studentemail) {
$studentemail = sanitize($studentemail);
$query = mysql_query("SELECT COUNT(`studentid`) FROM `student` WHERE `studentemail`
= '$studentemail'");
return (mysql_result($query, 0) == 1) ? true : false;
}
function studentid_from_student ($studentemail) {
$studentemail = sanitize($studentemail);
return mysql_result(mysql_query("SELECT `studentid` FROM `student` WHERE `studentemail` = '$studentemail'"), 0, 'studentid');
}
`function login($studentemail, $studentpassword) {
$studentid = studentid_from_student($studentemail);
$studentemail = sanitize($studentemail);
$studentpassword = md5($studentpassword);
return (mysql_result(mysql_query("SELECT COUNT(`studentid`) FROM `student` WHERE `studentemail` = '$studentemail' AND `studentpassword` = '$studentpassword'"), 0) == 1) ? $studentid : false;
}
?>

Answer 1

I suggest to change your logic, extracting users and admins from two different table. Make them in only one table, but all users should contain column flag for example, where flag=1 is ADMIN and flag=0 is USER.

Answer 2

all i can suggest as i am not a php coder but have done some in the past is to add another field in your database where you will set levels of privileges for users (0 for normal members, 1 for admin). After you have done that just add it to your users script through php coding which i barely know. Hope that helps a little bit.