'Sesame Seed Puff', 'square' => 'Coconut Milk Gelatin Square',
'cake' => 'Brown Sugar Cake',
'ricemeat' => 'Sweet Rice and Meat');
// Logic to do the right thing based on // the hidden _submit_check parameter
if ($_POST['_submit_check']) {
// If validate_form( ) returns errors, pass them to show_form( )
if ($form_errors = validate_form( )) {
show_form($form_errors);
} else {
process_form( );
}
} else {
show_form( );
}
// Do something when the form is submitted
function process_form( ) {
print "You ordered a ". $_POST['order'];
}
// Display the form
function show_form($errors='') {
if($errors) {
print "";
foreach($errors as $error){
print "- $error
";
}
print "
";
}
print<<<_HTML_
_HTML_;
}
// Check the form data
function validate_form( ) {
// Start with an empty array of error messages
$errors = array( );
if (! array_key_exists($_POST['order'], $GLOBALS['sweets'])) {
$errors[ ] = 'Please choose a valid order.';
}
return $errors;
}
?>