wp_download_links.php

<?php
/**
 * Output the navigation footer and primary menu too a json file
 */
require_once('../../../wp/wp-load.php');
header('content-type application/json charset=utf-8');
$menus = get_registered_nav_menus();
$json  = ' jsonCallback({';
foreach ($menus as $location => $description) {
    if (($locations = get_nav_menu_locations()) && isset($locations[$location])) {
        $menu       = wp_get_nav_menu_object($locations[$location]);
        $menu_items = wp_get_nav_menu_items($menu->term_id);
        $json .= '"' . $location . '":[';
        $count            = 0;
        $count_menu_items = count($menu_items);
      foreach ((array)$menu_items as $key => $menu_item) {
        $check_id = $menu_item->db_id;
        $parent = "No";
     
      	foreach ((array)$menu_items as $value => $menu_sub) {
        
        	if ($check_id == $menu_sub->menu_item_parent){
        				$parent = "Yes";
						break;
        	}

       	 }


    if ($menu_item->menu_item_parent > 0) {

           $json .= '{' . '"' . 'name' . '":' . '"' . esc_attr(
                        $menu_item->title
                    ) . '",' . '"' . 'link' . '":' . '"' . esc_attr(
                        fixUrl($menu_item->url)
                    ) . '",' . '"' . 'id' . '":' . '"' . $menu_item->db_id . '",' . '"' . 'parent_id' . '":' . '"' . $menu_item->menu_item_parent . '",' . '"Parent":' . '"No"' . '}';


                }else {
                                        $json .= '{' . '"' . 'name' . '":' . '"' . esc_attr(
                             $menu_item->title
                                ) . '",' . '"' . 'link' . '":' . '"' . esc_attr(
                                fixUrl($menu_item->url)
                        ) . '",' . '"' . 'id' . '":' . '"' . $menu_item->db_id .'",'. '"Parent":' . '"' . $parent.'"'. '}';

            }
        
        
            if ($count != $count_menu_items - 1) {
                $json .= ",";
            }

            $count++;
        }
        $json .= '],';

    }
}
$json = rtrim($json, ',');
$json .= '});';
print(prettyPrint($json));

function fixUrl($url)
{
    if (false === strpos($url, '//')) {
        $url = home_url($url);
    }
    $url =  str_replace(array('http://','https://'), '//', $url);
    return $url;
}

/**
 * @param $json
 *
 * @return string
 */
function prettyPrint($json)
{
    $result          = '';
    $level           = 0;
    $prev_char       = '';
    $in_quotes       = false;
    $ends_line_level = null;
    $json_length     = strlen($json);

    for ($i = 0; $i < $json_length; $i++) {
        $char           = $json[$i];
        $new_line_level = null;
        $post           = "";
        if ($ends_line_level !== null) {
            $new_line_level  = $ends_line_level;
            $ends_line_level = null;
        }
        if ($char === '"' && $prev_char != '\\') {
            $in_quotes = !$in_quotes;
        } else {
            if (!$in_quotes) {
                switch ($char) {
                    case '}':
                    case ']':
                        $level--;
                        $ends_line_level = null;
                        $new_line_level  = $level;
                        break;

                    case '{':
                    case '[':
                        $level++;
                    case ',':
                        $ends_line_level = $level;
                        break;

                    case ':':
                        $post = " ";
                        break;

                    case " ":
                    case "\t":
                    case "\n":
                    case "\r":
                        $char            = "";
                        $ends_line_level = $new_line_level;
                        $new_line_level  = null;
                        break;
                }
            }
        }
        if ($new_line_level !== null) {
            $result .= "\n" . str_repeat("\t", $new_line_level);
        }
        $result .= $char . $post;
        $prev_char = $char;
    }

    return $result;
}