Unnamed

<?php
$sweets = array('puff' => '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 "<ul>";
        foreach($errors as $error){
            print "<li>$error</li>";
        }
        print "</ul>";
    }
    print<<<_HTML_
<form method="post" action="$_SERVER[PHP_SELF]"> 
Your Order: <select name="order"> 
_HTML_;
// $val is the option value, $choice is what's displayed 
foreach ($GLOBALS['sweets'] as $val => $choice) { 
    print "<option value=\"$val\">$choice</option>\n"; 
} 
print<<<_HTML_
</select> 
<br/> 
<input type="submit" value="Order"> 
<input type="hidden" name="_submit_check" value="1"> 
</form> 
_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; 
}
?>