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<?php

// Use shortcodes within text widgets
add_filter('widget_text', 'do_shortcode');


// wp_nav_menu
add_shortcode('wp_nav_menu', 'wp_nav_menu_shortcode');
function wp_nav_menu_shortcode($atts = array(), $content = '')
{
    $atts['echo'] = false;

    return wp_nav_menu($atts);
}

// get_search_form
add_shortcode('get_search_form', 'get_search_form_shortcode');
function get_search_form_shortcode($atts = array(), $content = '')
{
    return get_search_form(false);
}