cakephp 3 url in controller
<p>I have to send url from controller to view with json..It not ok when i use $this->Html->link or $this->Url->build for link. How can i send link to json..</p>

<p>use Cake\View\Helper\UrlHelper;  at top</p>

<pre><code>foreach($schedules as $s) :
            $start=$s-&gt;start_at;
            $end=$s-&gt;finished_at;

   $link= $this-&gt;Url-&gt;build([ 
                                    'controller' =&gt; 'Bookings','action' =&gt; 'makebooking',
                                    'comid' =&gt; 1,
                                    'comslug' =&gt;'Moe Moe',
                                    'sevid'=&gt;2,
                                    'sevslug'=&gt;'face washing',
                                    'sid'=&gt;$s-&gt;id,
                                    'start'=&gt;$start,
                                    'end'=&gt;$end
                                    ]); 
            $out[]=array(
                'id'=&gt;$s-&gt;id,
                'title'=&gt;'( '.$s-&gt;start_at.'-'.$s-&gt;finished_at.' )'.$s-&gt;name,
                'url'=&gt;$link,
                'start'=&gt;strtotime($s-&gt;start_at).'000',
                'class'=&gt;'event-important'

                );
         endforeach;


         echo json_encode(array('success'=&gt;1,'result'=&gt;$out));exit;
</code></pre>

<p>Error: Call to a member function build() on a non-object 
and i was</p>