如何：如果主页，做X TWIG PHP

I am trying to add a p tag to the footer if the page is the home page, I am using spicycp, which uses .twig files.

I have tried a number of php if statements, but alas, to no avail:

 <p class="kktag">Digital Marketing by <a href="http://kingkong.com.au/" target="_blank">King Kong</a>
</p>
{% endif %} 
</p>   

and

$host = $_SERVER['SERVER_NAME'] . $_SERVER['REQUEST_URI'];
if($host == 'https://lfsigns.com.au/') 
{
   <p class="kktag">Digital Marketing by <a href="http://kingkong.com.au/" target="_blank">King Kong</a>
</p>
}
else
{
   <p class="kktag">Digital Marketing by King Kong</p>
}

and

{% if is_front %}
  <p class="kktag">Digital Marketing by <a href="http://kingkong.com.au/" target="_blank">King Kong1</a> </p>
{% endif %} 

and

{% if entry.id == 4 %}
<p class="kktag">Digital Marketing by <a href="http://kingkong.com.au/" target="_blank">King Kong</a>
</p>
{% endif %} 
</p> 

and

{% if template == 'index' %}
<p class="kktag">Digital Marketing by <a href="http://kingkong.com.au/" target="_blank">King Kong</a>
</p>
 {% endif %}

and

{% if is_front_page %} 
   <p> do something </p> 
{% else %} 
   <p> do something else. </p>
{% endif %}

But none of these seem to work, any ideas/suggestions/advice would very much appreciated,

Thanks everyone

You can get the current URL from the Request object. More details (Symfony docs).

{% if app.request.uri == 'https://lfsigns.com.au/' %}
    <p class="kktag">Digital Marketing by <a href="http://kingkong.com.au/" target="_blank">King Kong1</a> </p>
{% endif %}