Yakidoo-WP-Theme/functions.php

<?php

function custom_excerpt_length( $length ) {
	return 30;
}

/*function yakidoo_theme_setup() {

}
add_action( 'after_setup_theme', 'yakidoo_theme_setup' );*/

add_filter( 'excerpt_length', 'custom_excerpt_length', 999 );
add_theme_support( 'post-thumbnails' ); // enable post thumbnails
set_post_thumbnail_size( 300, 200, true );
add_image_size("featured", 263, 250, true);
add_image_size("featured-wide", 555, 250, true);

function register_my_menus() {
  register_nav_menus(
    array(
      'header-menu' => __( 'Header Menu' ),
      'header-sub-menu' => __( 'Header Sub-menu' )
    )
  );
}
add_action( 'init', 'register_my_menus' );

function yakidoo_widgets_init() {
    register_sidebar( array(
        'name' => __( 'Main Sidebar', 'theme-slug' ),
        'id' => 'sidebar-1',
        'description' => __( 'Widgets in this area will be shown on all posts and pages.', 'theme-slug' ),
        'before_widget' => '<li id="%1$s" class="widget %2$s">',
	'after_widget'  => '</li>',
	'before_title'  => '<h2 class="widgettitle">',
	'after_title'   => '</h2>',
    ) );
}
add_action( 'widgets_init', 'yakidoo_widgets_init' );

class Yakidoo_Walker extends Walker {

    // Tell Walker where to inherit it's parent and id values
    var $db_fields = array(
        'parent' => 'menu_item_parent',
        'id'     => 'db_id'
    );

    /**
     * At the start of each element, output a <li> and <a> tag structure.
     *
     * Note: Menu objects include url and title properties, so we will use those.
     */
    function start_el( &$output, $item, $depth = 0, $args = array(), $id = 0 ) {
        $output .= sprintf( "\n<li itemscope=\"itemscope\" itemtype=\"http://schema.org/SiteNavigationElement\"><a href='%s'%s itemprop=\"url\"><span itemprop=\"name\">%s</span></a></li>\n",
            $item->url,
            ( $item->object_id === get_the_ID() ) ? ' class="current"' : '',
            $item->title
        );
    }

}

?>