index.php

<?php
ob_start();
session_start();
if (isset($_SESSION['Username'])) {
    ?><meta http-equiv="refresh" content="0; url=<? $site; ?>/start.php">
<? }

$aa = 0;
include ('config.php');
if (isset($_POST['formsubmitted'])) {
// Initialize a session:
session_start();
$error = array(); //this aaray will store all error messages


if (empty($_POST['Username'])) {//if the email supplied is empty
$error[] = 'You forgot to enter  your Email ';
} else {
$Username = $_POST['Username'];
}


if (empty($_POST['Password'])) {
$error[] = 'Please Enter Your Password ';
} else {
$Password = $_POST['Password'];
}


if (empty($error)) {//if the array is empty , it means no error found
$query_check_credentials = "SELECT * FROM members WHERE (Username='$Username' AND password='$Password') AND Activation IS NULL";


$result_check_credentials = mysqli_query($dbc, $query_check_credentials);
if (!$result_check_credentials) {//If the QUery Failed
echo 'Query Failed ';
}

if (@mysqli_num_rows($result_check_credentials) == 1) {//if Query is successfull  // A match was made.
$_SESSION = mysqli_fetch_array($result_check_credentials, MYSQLI_ASSOC); //Assign the result of this query to SESSION Global Variable
?><meta http-equiv="refresh" content="0; url=<? echo $site; ?>/start.php"><?
} else {

$msg_error = 'Either Your Account is inactive or Username /Password is Incorrect';
}
} else {


echo '<div class="errormsgbox"> <ol>';
foreach ($error as $key => $values) {

echo '  <li>' . $values . '</li>';
}
echo '</ol></div>';
}


if (isset($msg_error)) {

$aa = 1;
}
var_dump($error);
mysqli_close($dbc);
} // End of the main Submit conditional.
?>


<!DOCTYPE html>
<!--[if lt IE 7 ]> <html lang="en" class="no-js ie6 lt8"> <![endif]-->
<!--[if IE 7 ]>    <html lang="en" class="no-js ie7 lt8"> <![endif]-->
<!--[if IE 8 ]>    <html lang="en" class="no-js ie8 lt8"> <![endif]-->
<!--[if IE 9 ]>    <html lang="en" class="no-js ie9"> <![endif]-->
<!--[if (gt IE 9)|!(IE)]><!--> <html lang="en" class="no-js"> <!--<![endif]-->
    <head>
        <meta charset="UTF-8" />
        <!-- <meta http-equiv="X-UA-Compatible" content="IE=edge,chrome=1">  -->
        <title><? echo $sitetitle; ?></title>
        <meta name="viewport" content="width=device-width, initial-scale=1.0">


        <link rel="stylesheet" type="text/css" href="css/demo.css" />
        <link rel="stylesheet" type="text/css" href="css/style3.css" />
        <link rel="stylesheet" type="text/css" href="css/animate-custom.css" />
    </head>
    <body>
        <div class="container">
            <!-- Codrops top bar -->
            <div class="codrops-top">
                <a href="<? echo $site; ?>/leader.php">
                    <strong>See the Leader Board</strong>
                </a>
                <span class="right">
                    <a href="<? echo $site; ?>/rules.php">
                        <strong>Read the Rules</strong>
                    </a>
                </span>
                <div class="clr"></div>
            </div><!--/ Codrops top bar -->
            <header>
                <h1><? echo $sitetitle; ?></h1>

            </header>
            <section>
                <div id="container_demo" >

                    <a class="hiddenanchor" id="toregister"></a>
                    <a class="hiddenanchor" id="tologin"></a>
                    <div id="wrapper">
                        <div id="login" class="animate form">
                            <form  method="post" action="index.php" autocomplete="on">
                                <h1>Log in</h1>


                                <? if (!isset($_SESSION['Username'])) {
                                ?><?
                                } else {
                                ?><li><a href="/logout.php">Logout</a></li><? }
                                ?>
                                </ul>
                                </nav>

                                <? if (!isset($_SESSION['Username'])) {
                                ?>
                                <form method="post" action="index.php" class="login">

                                    <p>
                                        <label for="username" class="uname" data-icon="u" > </br> </label>
                                        <input name="Username" required="required" type="text" id="Username" placeholder="Username">
                                    </p>

                                    <p><label for="password" class="youpasswd" data-icon="p"> </br> </label>
                                        <input name="Password" required="required" type="password" id="Password" placeholder="Password">
                                    </p>

                                    <input type="hidden" name="formsubmitted" value="TRUE" />
                                    <p class="login button">
                                        <input type="submit" value="Login" />

                                    </p>

                                    <p class="forgot-password"><a href="forgot.php">Forgot password?</a></p>
                                </form>
                                <? } ?>


                                <p class="change_link">
                                    Not a member yet
                                    <a href="#toregister" class="to_register">Join us</a>
                                </p>
                            </form>
                        </div>


                        <div id="register" class="animate form">
                            <form  method="post" action="register.php" autocomplete="on">
                                <h1> Sign up </h1>
                                <p> <label for="username" class="uname" data-icon="u" >  </br></label>
                                    <input placeholder="Your Name" id="n" name="n" required="required" type="text"  />
                                </p>
                                <p> <label for="emailsignup" class="youmail" data-icon="e" > </br> </label>
                                    <input id="e-mail" name="e-mail" required="required" type="email" placeholder="Your Email"/>
                                </p>

                                <p> <label for="username" class="uname" data-icon="u" > </br> </label>
                                    <input  name="schoolname" required="required" type="text" placeholder="School Name" id="schoolname"/>
                                </p>
                                <p> <label for="username" class="uname" data-icon="u" > </br> </label>
                                    <input id="name" name="name" required="required" type="text" placeholder="Your Username" />
                                </p>
                                <p> <label for="password" class="youpasswd" data-icon="p"> </br> </label>
                                    <input id="Password" name="Password" required="required" type="password" placeholder="Password"/>
                                </p>
                                <p class="signin button">
                                    <input type="hidden" name="formsubmitted" value="TRUE" />
                                    <input type="submit" name="send" value="Register" id="submit" />
                                </p>
                                <p class="change_link">
                                    Already a member
                                    <a href="#tologin" class="to_register"> Go and log in </a>
                                </p>
                            </form>
                        </div>

                    </div>
                </div>
            </section>
        </div>
    </body>
</html>