meta field INTRO

// META BOX INTRO

add_action( 'add_meta_boxes', 'intro_select_box' );
function intro_select_box() {
    add_meta_box(
        'intro_select_box', // id, used as the html id att
        __( 'Introduzione' ), // meta box title
        'intro_select_cb', // callback function, spits out the content
        'post', // post type or page. This adds to posts only
        'side', // context, where on the screen

    );

}

function intro_select_cb( $post ) {
    global $wpdb;
    $value = get_post_meta($post->ID, 'intro', true);


    $intros = array(
  __('The apartment consists of','sacconicase') => ' L\'appartamento si compone di',

  __('The house comprises of','sacconicase') => 'La casa si compone di',

__('The bungalow comprises of','sacconicase') => 'Il bungalow si compone di',

  __('The apartment comprises of 1 room with living area/sleeping area + 1 bathroom','sacconicase') => 'L\'appartamento si compone di un unico ambiente zona giorno/notte + 1 bagno',


);

    echo '<select name="intro">';
    echo '<option value=""' . ((($value == '') || !isset($intros[$value])) ? ' selected="selected"' : '') . '> ----</option>';

    // output each floor as an option
    foreach ($intros as $id => $text) {
        echo '<option value="' . $id . '"' . (($value == $id) ? ' selected="selected"' : '') . '">' . $text. '</option>';
    }
    echo '</select>';


}

add_action( 'save_post', 'save_metadata_intro');

function save_metadata_intro($postid)
{
    if ( defined( 'DOING_AUTOSAVE' ) && DOING_AUTOSAVE ) return false;
    if ( !current_user_can( 'edit_page', $postid ) ) return false;
    if( empty($postid) ) return false;


    if ( is_null($_REQUEST["intro"]) ) {
        delete_post_meta($postid, 'intro');
    } else {
        update_post_meta($postid, 'intro', $_REQUEST['intro']);
    }

}
// END INTRO