http://php.flashwebhost.com/annie/game.php

Code:
<html>
<body>

<h1>Number Guessing Game.</h1>

<?php

  if (isset($_GET['secretNumber'])) {
   $secretNumber = $_GET['secretNumber'];
  } else {
   $secretNumber = rand(1,100);
  }
  if (isset($_GET['userNumber'])) {
  $userNumber = $_GET['userNumber'];

  if ($secretNumber > $userNumber) {
  echo '<h1 style="color:Red">Your number is too SMALL.</h1>';
  } else if ($secretNumber < $userNumber) {
   echo '<h1 style="color:DarkOrchid ">Your number is too BIG.</h1>';
  } else {
   echo '<h1 style="color:green">You win the game.</h1>';
  }
   } 
  ?> 
  <form method="GET" action="">
   Enter Number: <input name="userNumber" type="text">
  <button type="submit">Check</button>
  <input type="hidden" name="secretNumber" value="<?php echo $secretNumber; ?>">
   </form>

  <h2>How to Play:</h2>

  <pre>
  * Server will pick a secret number between 1 and 100.
  * You guess what number it is.
  * If your guess is too high or too low, Server will give you a hint.
  * See how many turns it takes you to win!
  </pre>

   </body>
  </html>