Untitled

<?php

$cash = 20000000;
$factories = Array(
    '1' => 12000000,
    '2' => 18000000,
    '3' => 24000000
);
if(strlen($_POST['submit']) > 0){
    $factoryCost = $factories[$_POST['factory']];
    if ($cash >= $factoryCost){
        $cash -= $factoryCost;
        echo "You have successfully built factory #" . $_POST['factory'] . '<br />';
        echo 'You have $' . number_format($cash) . ' remaining.<hr />';
    }else{
        echo 'You do not have sufficient funds. <span style="color: #900;">$' . number_format($cash - $factoryCost) . '</span><hr />';
    }
}

?>
<html>
    <head>
        <title>Factory Purchasing</title>
    </head>
<body>
    <form method="POST">
        You Currently have $<?php echo number_format($cash); ?> in the bank.<br />
        Select Factory to purchase:<br />
        <?php
            foreach($factories as $num=>$cost){
                echo '<input type="radio" name="factory" value="' . $num . '" />#' . $num . ' ($' . number_format($cost) . ')<br />';
            }

        ?>
        <input type="submit" name="submit" value="Purchase" />
    </form>
</body>
</html>