Form Navigation

form-navigation.php

<?php 
$chapter = ( $_POST[ 'chapter' ] );
?>

<h1><?php echo ucwords( $chapter ); ?></h1>

<h2>Please select a chapter below:</h2>
<form action="<?php $_SERVER['PHP_SELF'] ?>" method="post">
    <select name="chapter">
        <option value="appetizers">Appetizers</option>
        <option value="main dishes">Main Dishes</option>
        <option value="cocktails">Cocktails</option>
        <option value="desserts">Deserts</option>
    </select>
    <input type="submit" value="Submit">
</form>

<?php 
if ($chapter == 'appetizers' ) {
    include 'appetizer.php';
} elseif ($chapter == 'main dishes' ) {
    include 'main.php';
} elseif ( $chapter == 'cocktails' ) {
    include 'cocktails.php';
} elseif ($chapter == 'desserts' ) {
    include 'desserts.php';
} else {
    echo 'Please select a chapter from above';
}
?>