How to add content above footer in posts from specific category

I think you would also have to check if a single page is being accessed. This can be done with

Untested:

function your_function() { 
if (is_single() && in_category(array ('cars' , 'trucks' ))) {
 echo '<p class="plus-footer">Custom content to insert</p>';
 }
}
add_action('get_footer', 'your_function');

@threadi

Thank you very much !

Your fast response and I learned something new

Tested, works fine !

—

Also for single, e.g.

if(is_single( 'opel' )){

if(is_single(array( 888, 159, 17 ))){

Greetings !

• This reply was modified 16 minutes ago by Arteaster.

Glad I could help. You are welcome to set the topic to solved.