Custop post type + Meta box + Save fields

<?php

//Custom post type: restaurant

add_action( 'init', 'create_post_type' );
function create_post_type() {
    register_post_type( 'restaurant',
        array(
            'labels' => array(
                'name' => __( 'Restaurants' ),
                'singular_name' => __( 'Product' ),
                'menu_name' => __( 'Restaurants' )
            ),
        'public' => true,
        'has_archive' => true,
        'taxonomies' => array('post_tag'),
        'capability_type' => 'page'
        )
    );
}

//Custom post type restaurant: categories
function restaurant_post_type_categories()
{
    register_taxonomy_for_object_type('category','restaurant');
}
add_action('init', 'restaurant_post_type_categories');

//Custom post type restaurant: metabox
function add_restaurant_meta_box() {
    add_meta_box(
        'custom_meta_box', // $id
        'Restaurant data', // $title
        'restaurant_data_form', // $callback
        'restaurant', // $page
        'normal', // $context
        'high'); // $priority
}
add_action('add_meta_boxes', 'add_restaurant_meta_box');

//Custom post type restaurant: metabox data fields
function restaurant_data_form()
{
    $prefix = 'rest_';
$rest_custom_meta_fields = array(
    array(
        'label'=> 'Address',
        'desc'  => 'Plugin use it to get map',
        'id'    => $prefix.'text_address',
        'type'  => 'text'
    ),
    //Use commented textarea to add a textarea field
    /*array(
        'label'=> 'Textarea',
        'desc'  => 'A description for the field.',
        'id'    => $prefix.'textarea',
        'type'  => 'textarea'
    ),  */
    array(
        'label'=> 'Postal code',
        'desc'  => 'Plugin use it to calculate distance between customer and restaurant. Can be used also to get map.',
        'id'    => $prefix.'text_postal_code',
        'type'  => 'text'
    ),
    array(
        'label'=> 'State',
        'desc'  => 'May be used to get map.',
        'id'    => $prefix.'text_state',
        'type'  => 'text'
    ),
    array(
        'label'=> 'Country',
        'desc'  => 'May be used to get map.',
        'id'    => $prefix.'text_country',
        'type'  => 'text'
    ),
    array(
        'label'=> 'City',
        'desc'  => 'May be used to get map.',
        'id'    => $prefix.'text_city',
        'type'  => 'text'
    ),
    array(
        'label'=> 'Book a table',
        'desc'  => ' This restaurants accept table booking',
        'id'    => $prefix.'checkbox_book_a_table',
        'type'  => 'checkbox'
    ),
    array(
        'label'=> 'Take away',
        'desc'  => ' This restaurants do take away',
        'id'    => $prefix.'checkbox',
        'type'  => 'checkbox'
    ),
    array(
        'label'=> 'Delivery',
        'desc'  => ' This restaurants do home delivery',
        'id'    => $prefix.'checkbox',
        'type'  => 'checkbox'
    ),
    array(
        'label'=> 'Table',
        'desc'  => 'Insert place-setting number.',
        'id'    => $prefix.'text_table',
        'type'  => 'text'
    ),
    array(
        'label'=> 'Child area',
        'desc'  => ' Yes, there is child area',
        'id'    => $prefix.'checkbox',
        'type'  => 'checkbox'
    ),
    array(
        'label'=> 'Parking',
        'desc'  => ' Yes, there is a car park',
        'id'    => $prefix.'checkbox',
        'type'  => 'checkbox'
    ),
);

//Show form fields
global $post;
// Use nonce for verification
echo '<input type="hidden" name="rest_custom_meta_box_nonce" value="'.wp_create_nonce(basename(__FILE__)).'" />';

    // Begin the field table and loop
    echo '<table class="form-table">';
    foreach ($rest_custom_meta_fields as $field) {
        // get value of this field if it exists for this post
        $meta = get_post_meta($post->ID, $field['id'], true);
        // begin a table row with
        echo '<tr>
                <th><label for="'.$field['id'].'">'.$field['label'].'</label></th>
                <td>';
                switch($field['type'])
                {
                    case 'text':
                                echo '<input type="text" name="'.$field['id'].'" id="'.$field['id'].'" value="'.$meta.'" size="30" />
        <br /><span class="description">'.$field['desc'].'</span>';
                                break;
                    case 'textarea':
                                echo '<textarea name="'.$field['id'].'" id="'.$field['id'].'" cols="60" rows="4">'.$meta.'</textarea>
        <br /><span class="description">'.$field['desc'].'</span>';
                                break;
                    case 'checkbox':
                                echo '<input type="checkbox" name="'.$field['id'].'" id="'.$field['id'].'" ',$meta ? ' checked="checked"' : '','/><label for="'.$field['id'].'">'.$field['desc'].'</label>';
                                break;
                    case 'select':
                                echo '<select name="'.$field['id'].'" id="'.$field['id'].'">';
                                foreach ($field['options'] as $option)
                                {
                                    echo '<option', $meta == $option['value'] ? ' selected="selected"' : '', ' value="'.$option['value'].'">'.$option['label'].'</option>';
                                }
                                echo '</select><br /><span class="description">'.$field['desc'].'</span>';
                                break;
                }
        echo '</td></tr>';
    } // end foreach
    echo '</table>'; // end table
}


//Custom post type restaurant: save metabox data
function save_restaurant_custom_meta($post_id)
{
    global $rest_custom_meta_fields;

    // verify nonce
    if (isset($_POST['custom_meta_box_nonce']) && (!wp_verify_nonce($_POST['rest_custom_meta_box_nonce'], basename(__FILE__))))
        return $post_id;
    // check autosave
    if (defined('DOING_AUTOSAVE') && DOING_AUTOSAVE)
        return $post_id;
    // check permissions
    if ('page' == $_POST['post_type'])
    {
        if (!current_user_can('edit_page', $post_id))
        {
             return $post_id;
        }
    }
    elseif (!current_user_can('edit_post', $post_id))
    {
            return $post_id;
    }

    // loop through fields and save the data
    foreach ($rest_custom_meta_fields as $field) {
        $old = get_post_meta($post_id, $field['id'], true);
        $new = $_POST[$field['id']];
        if ($new && $new != $old) {
            update_post_meta($post_id, $field['id'], $new);
        } elseif ('' == $new && $old) {
            delete_post_meta($post_id, $field['id'], $old);
        }
    } // end foreach
}
echo add_action('save_post', 'save_restaurant_custom_meta');
?>