<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>Guessing Game</title>
<link rel="stylesheet" href="../lit/genstyle.css" type="text/css">
<style>
body { text-align: center; }
p { width: 80%; margin: auto; }
p.first { font-style: italic; }
p.win {
background-color: rgb(30%,100%,30%);
color: dark-green;
padding: 0.3em;
}
p.lose { background-color: red; padding: 0.3em; }
form { margin-top: 0.5em; }
input[type="text"] { text-align: right; }
</style>
</head>
<body>
<h1>Guessing Game</h1>
<h2>This page is the home of the wonderful guessing game.
How exciting!</h2>
<?php
define("GUESS_LIMIT", 6);
define("MAX_NUM", 100);
// This tells if the code should generate the start again form
// as opposed to the guess again form.
$start_form = 0;
// Do this when someone comes here by a plain link.
if(!$_POST) {
/* This runs if there is no post data, so it was not run from a
form. */
$start_form = 1;
echo <<<END
<p class="first">This page is the home of the
exciting number guessing game, where I pick a
number and you try to figure out what it is.
Would you like to play?</p>
END;
} else {
$resend = 1;
if($_POST['initial'] === "1") {
// First load. Choose the number.
$randno = rand(1,MAX_NUM);
$guesscount = 0;
$comment = '';
echo "<p>I'm thinking of a number between 1 and ", MAX_NUM,
". Can you guess it?</p>";
} else {
// Not first load. Need to evaluate.
$randno = $_POST['randno'];
$guess = $_POST['guess'];
$guesscount = $_POST['guesscount'];
if($randno == $guess) {
$start_form = 1;
echo "<p class='win'>Congratulations! Your guess of $guess ",
"is correct! Would you like to play again?</p>";
}
else {
if($guess < $randno - MAX_NUM / 2) {
$comm = "way too small";
$comcl = "wts";
} elseif($guess < $randno) {
$comm = "too small";
$comcl = "ts";
} elseif($guess > $randno + MAX_NUM / 2) {
$comm = "way too large";
$comcl = "wtl";
} else {
// Already checked if it matches exactly.
$comm = "too large";
$comcl = "tl";
}
echo "<p class='wrong'>No, your guess of $guess is $comm. ";
// See if the game will continue.
if($guesscount < GUESS_LIMIT) {
echo "Care to try again? You have ",
GUESS_LIMIT-$guesscount, " guesses left.</p>";
} else {
echo "</p><p class='lose'>I'm sorry, you have used all ",
"of your ", GUESS_LIMIT, " guesses. The number ",
"I was thinking of was $randno. Would you like ",
"to try again?</p>";
$start_form = 1;
}
}
}
}
// Game continues. Generate the correct form.
$me = $_SERVER['PHP_SELF'];
if($start_form) {
echo <<<END
<form method="post" action="$me">
<input type="submit" value="YES">
<input type="hidden" name="initial" value="1">
</form>
END;
} else {
++$guesscount;
echo <<<END
<form method="post" action="$me">
<input type="text" name="guess" size="3">
<input type="submit" value="GO">
<input type="hidden" name="randno" value="$randno">
<input type="hidden" name="guesscount" value="$guesscount">
</form>
END;
}
?>
</body>
</html>