Wordpress增加element到選單上，增加搜尋框到WP選單上、增加日期、增加部落格標題

wordpress_add_elements_to_menu.php

<?php
//----- add a search bar to your nav menu

add_filter('wp_nav_menu_items','add_search_box', 10, 2);
function add_search_box($items, $args) {
 
        ob_start();
        get_search_form();
        $searchform = ob_get_contents();
        ob_end_clean();
 
        $items .= '<li>' . $searchform . '</li>';
 
    return $items;
}

//----- add Blog Title

// Filter wp_nav_menu() to add additional links and other output
function new_nav_menu_items($items) {
    $homelink = '<li class="home"><a href="' . home_url( '/' ) . '">' . get_bloginfo('name') . '</a></li>';
    //$feedlink = '<li class="feed"><a href="' . get_bloginfo_rss('rss2_url') . '">' . __('RSS') . '</a></li>';
    //$random_text = '<li class="rainbows"><a href="#">OMG ... Double Rainbows!</a></li>';
    $items = $homelink . $items;
    //$items = $items . $feedlink;
    //$items = $items . $random_text;
    return $items;
}
add_filter( 'wp_list_pages', 'new_nav_menu_items' );
add_filter( 'wp_nav_menu_items', 'new_nav_menu_items' );


//----- add Date

add_filter('wp_nav_menu_items','add_date', 10, 2);
function add_date($items, $args) {
    $items .= '<li class="navdate">' . date("l F jS, Y") . '</li>';
    return $items;
}

//----- Date CSS

.navdate { 
  color: #fff; 
	float: right !important;
	border: 0 !important;
	padding: 10px;
}

//----- 指定 MENU

add_filter('wp_nav_menu_items','add_date', 10, 2);
function add_date($items, $args) {
    if( $args->theme_location == 'main' )
        return $items . '<li class="navdate">' . date("l F jS, Y") . '</li>';
 
    return $items;
}