PHP Tutorials and code

PHP Tutorial : Membership script – Users Login

Jun 13, 2009 Complete Scripts

Welcome back to the simple php membership script tutorial.

Last time we saw how to create the php user registration function. We will continue today with the php login function and will also see how to check if a user is logged in or not.

<?php
function loginUser($user, $pass) {

if(empty($user) || empty($pass)) {
exit();
}else{
$user = addentities($user);
$pass = addentities($pass);
$sql = "select * from users where user = '$user' and pass = '$pass'";
$rs = mysql_query($sql);

if($rs) {

if(mysql_num_rows($rs) != 0) {
$row=@mysql_fetch_object($rs);
$_SESSION['logged'] = "yes";
$_SESSION['user'] = $user;

refreshPage(0, $_SERVER['PHP_SELF']);
}else{

print "Wrong username and password";
}
}
}
}
?>

Now, how simple is it to check if a user is logged in?

<?php

if(checkLogged() == false) {

print "You are not authorized to see this page, please login first!";
}elseif(checkLogged() == true) {

print "Welcome $_SESSION[user]";
}
?>

Please note that you must add the session_start(); function at the very begining of the script, before outputing anything else! Check this blog for detailed instructions on how to use sessions.

See you next time and happy coding!

Tags: check logged in user, login area, membership script, php login user, php membership, users login