http://php.flashwebhost.com/sherly/secret_number1.php

Code:
<?php
session_start();
if (isset($_SESSION['secretNumber'])) {
    $secretNumber = $_SESSION['secretNumber'];
} else {
$secretNumber = rand(1,100);
$_SESSION['secretNumber'] = $secretNumber;
}
if (isset($_POST['userNumber'])) {
if ($_POST['userNumber'] == $secretNumber) {
        $_SESSION['secretNumber'] = rand(1,100);
}
}

?>
<html>
<body>

<center><h1>Number Guessing Game.</h1></center>
<?php

if (isset($_POST['userNumber'])) {
    $userNumber = $_POST['userNumber'];
    if ($secretNumber > $userNumber) {
        echo '<center><h1 style="color:red">Your number is too SMALL.</h1></center>';
    } else if ($secretNumber < $userNumber) {
        echo '<center><h1 style="color:blue">Your number is too BIG.</h1></center>';
    } else {
        echo '<center><h1 style="color:green">You win the game.</h1></center>';
    }
}
?>

<form method="POST" action="">
<center>Enter Number: <input name="userNumber" type="text"></center>
<center><button type="submit">Check</button></center>
</form>

</body>
</html>