PHP and MySQL Web Development 4th Ed-tqw-_darksiderg

706 Chapter 30 Building a Mailing List Manager
not log you in with that email address
and password.";
}
}
if($action == 'log-out') {
unset($action);
$_SESSION=array();
session_destroy();
}
As you can see, you first try to log the user in by using the login() function from the
user_auth_fns.php library.This function is slightly different from the login functions
used elsewhere, so let’s look at it more closely.The code for this function is shown in
Listing 30.5.
Listing 30.5 login()Function from user_auth_fns.php—This Function Checks a
User’s Login Details
function login($email, $password) {
// check username and password with db
// if yes, return login type
// else return false
// connect to db
$conn = db_connect();
if (!$conn) {
return 0;
}
$query = "select admin from subscribers
where email='".$email."'
and password = sha1('".$password."')";
$result = $conn->query($query);
if (!$result) {
return false;
}
if ($result->num_rowsfetch_array();
if($row[0] == 1) {
return 'admin';