Hi Guenn – ‘OR’ has been working okay for me, but as per your suggestion I’ve changed it to:
||
as this looks to be more standard?!

For anyone else in the same situation, this is the final code I have that accounts for logos related to other parent pages and their sub-pages if that makes sense!:

//change the logo for page and all child pages 
//first is the function to find all child pages
function is_tree($pid)
{
 global $post;

 $ancestors = get_post_ancestors($post->$pid);
 $root = count($ancestors) - 1;
 $parent = $ancestors[$root];

 if(is_page() && (is_page($pid) || $post->post_parent == $pid || in_array($pid, $ancestors)))
 {
   return true;
 }
 else
 {
   return false;
 }
};
//second is the function to change the logo, note the "is_tree"
add_filter('avf_logo','av_change_logo');
function av_change_logo($logo)
{
   if (is_tree(515) || is_singular('procurement-pages')) 
{
	$logo = "[logo url]";
}
   elseif (is_tree(509)) 
{
	$logo = "[logo url]";
}
	elseif (is_tree(530)) 
{
	$logo = "[logo url]";
}

   return $logo;
}

Obviously you would swap [logo url] for your logo url, and the numbers such as ‘530’ would need to reflect the page id of the parent page. Thanks again to Mike for his help with this!

• This reply was modified 5 years, 9 months ago by alsterb.

Thanks Mike – I will give that a go! Just one question – is it possible with that code to specify any sub pages of a specific page?

So something like:

add_filter('avf_logo','av_change_logo');
function av_change_logo($logo)
{
    if(is_page(632) [or sub pages of this page??] )
    {
    $logo = "http://kriesi.at/wp-content/themes/kriesi/images/logo.png";
    }
    return $logo;
}

Thanks, Alex

@mensmaximus – thank you, I’m just reading through your posts now, I’m just updating to woo commerce 3.0.4, but I was using 3.0.1, so looks to be the same issue!

Hi Jordan,

Thanks for your reply – sorry mine’s a bit late since the email from here landed in my Junk!

The suggestions you’ve posted are good, but have made no difference. Sorry I did make a typo in my question regarding catalogue images being 45 x450px – they are 450 x 450px!

The problem is that I have a div of about 400px sq, but when inspecting the attributes for the image used it’s set at 120px sq. I’ve included the source for this below (private) plus a link to the web page so you can see the issue yourself since there is a live one up online now…

It’s as if it is selecting the wrong size from srcset maybe? Like instead of using the catalogue image here that is available, it’s selecting the thumbnail. I could make the thumbnail size huge, but that would then slow down pages with lots of thumbnails…

Thanks again for your help!

• This reply was modified 7 years, 6 months ago by alsterb.