User authentication

cranks · November 28, 2014

Hello.

I have created my login, and my main page for a game i am making.

How do i do it so only logged in users can access certain pages, otherwise it redirects them back to the login.

I am so confused and have been trying for hours :/

Please excuse the sloppy coding, i'm still learning XD

Index.php : (login)

<html>
<body bgcolor="666633">
<link rel="stylesheet" type="text/css" href="style.css">
<div id="topnav">
<strong><center><font color= "white">BATTLE-SCAPE</font></strong></center>
</div>
<div id="gamenav">
<h1>Login</h1>
<?php
if (!isset($_POST['submit'])){
?>
<!-- The HTML login form -->
<form action="<?=$_SERVER['PHP_SELF']?>" method="post">
	Username: <input type="text" name="username" /><br />
	Password: <input type="password" name="password" /><br />

	<input type="submit" name="submit" value="Login" />
</form>
<?php
} else {
require_once("config.php");
$mysqli = new mysqli(DB_HOST, DB_USER, DB_PASS, DB_NAME);
# check connection
if ($mysqli->connect_errno) {
	echo "<p>MySQL error no {$mysqli->connect_errno} : {$mysqli->connect_error}</p>";
	exit();
}

$username = $_POST['username'];
$password = $_POST['password'];
$sql = "SELECT * from users WHERE username LIKE '{$username}' AND password LIKE '{$password}' LIMIT 1";
$result = $mysqli->query($sql);
if (!$result->num_rows == 1) {
	echo "<p>Invalid username/password combination</p>";
} else {
	header('Location: main.php');
}
}
?>		
<footer>
 <p>Copyright(c) Connor Smith 2014-2015</p>
</footer>
</center>
</html>

Main.php

<?php
session_start();
if(!isset($_SESSION['username'])){
  header("Location:index.php");
}
?>
<html>
<body style="background-image:url(/grid/img_bin/background.png); background-size:100%"/>
<link rel="stylesheet" type="text/css" href="style.css">
<title>Battle-Scape : Logged in as Connor</title>
<div id="bodyoutline">
<div id="topnav">
<center>Battle-Scape</center>
</div>
<div id="wilderness">
Wilderness pictures goes here...
</div>
<div id="layout">
<div id="gamenav">
<center>
<strong><a href="character.php" style="text-decoration: none">|Character|</a><strong>
<strong><a href="fighting.php" style="text-decoration: none">|Fighting|</a><strong>
<strong><a href="community.php" style="text-decoration: none">|Community|</a><strong>
<strong><a href="settings.php" style="text-decoration: none">|Settings|</a><strong>
<strong><a href="index.php" style="text-decoration: none">|Logout|</a><strong>
</center>
</div>
<br />
<div id="body">
<strong>Updates! :</strong>
<br />
Finish the template : <font color ="red">20%</font>
<br />
Link the other pages : <font color ="red">0%</font>
<br />
Make working login/register : <font color ="red">0%</font>
</br >
<br />
-Connor
</div>
<div id="playernavbar2">
<div id="chatbox">
<div id="chatboxname">
<center><strong>ChatBox</center></strong>
</div>
<br />
<br />
<br />
<br />
<br />
<br />
<br />
<br />
<br />
<br />
<br />
<br />
<center><input type="text" size="14px"> <input type="submit" value=">"></center>
</div>
 </div>
 <div id="playernavbar">
 <div id="username">
<center><strong>Connor</center></strong>
</div>
<div id="char">
<div id="charlevel">
<center><font color= "F0F0F0">100</font></center>
</div>
</div>
<div id="charinfo">
Health :
<br />
EXP :
<br />
Energy: 0
<br />
Badges: 0
<br />
Gold: 0
</div>
  <div id="gamestats">
  <center><strong>Game Stats</center></strong>
Players online : 0
<br />
</div>
<div id="links">
<center><strong>Game Links</center></strong>
o Home
<br />
o Messages
<br />
o Attack
<br />
o Clan
<br />
</body>
</html>

Edited November 28, 2014 by cranks

SRB · November 28, 2014

Use code tags or post on pastebin and just put a link here

cranks · November 28, 2014

Use code tags or post on pastebin and just put a link here

Sorry about that, fixed.

KyleMassacre · November 28, 2014

What you can do is include some sort of globals file that checks for the users session and if it exists then let them proceed, if not then redirect them.

cranks · December 1, 2014

Thank you, i have managed to fix the problem now! :)

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