WP Taxonomy Meta

add_action( 'edited_rp_booking_types', 'rp_taxonomy_meta_update_post', 10, 2 );

function rp_taxonomy_meta_create_post( $term_id, $tt_id ){
    global $wpdb;

    $postID = wp_insert_post( array( 'post_title' => "taxonomy-meta-term-{$term_id}", 'post_type' => 'rp_taxonomy_meta' ) );

    return $postID;
}

function rp_taxonomy_meta_update_post( $term_id, $tt_id ){
    global $wpdb;

    if ( !$post_id = post_exists( "taxonomy-meta-term-{$term_id}" ) ){
        $post_id = rp_taxonomy_meta_create_post( $term_id, $tt_id );
    }

    if ( $post_id === 0 || is_null( $post_id ) ){
        return;
    }

    $meta_key = 'booking_type_color';
    $meta_value = esc_attr( $_POST["booking_type_color"] );

    update_post_meta( $post_id, $meta_key, $meta_value);
}

function rp_taxonomy_meta_get_meta( $term_id ){

    $post_id = post_exists( "taxonomy-meta-term-{$term_id}" );

    if ( $post_id ){
        return get_post_meta( $post_id, 'booking_type_color' );
    }
}