gistfile1.php

<?php
namespace UserTags\View\Helper;

use Cake\View\Helper;
use Cake\View\View;
use UserTags\Traits\TagTrait;

/**
 * Tag helper
 */
class TagHelper extends Helper
{
    use TagTrait;

    public $helpers = ['Url'];
    
    /**
     * Default configuration.
     *
     * @var array
     */
    protected $_defaultConfig = [];
    
    public function url($url, $full = true, $user = null)
    {
        // Se l'utente non è stato impostato restituisco l'url senza tagging
        if (!is_numeric($user)) {
            return $this->Url->build($url, $full);
        }
                
        if (is_string($url)) {
            
            $urlInfo = parse_url($url);

            if (!empty($urlInfo['query'])) {
                parse_str($urlInfo['query'], $params);
            } else {
                $params = [];
            }            
            
            $params['user'] = $this->encrypt($user);
            
            $urlInfo['query'] = http_build_query($params);

            $url = $urlInfo['path'] .'?'. $urlInfo['query'];            
        }
        
        if (is_array($url)) {
            $url['user'] = $this->encrypt($user);
        }
        
        return $this->Url->build($url, $full);
    } 
}