Different logos for different pages/categories

this might help:
(Example page-id is 2854)

add_filter('avf_logo','av_change_logo');
function av_change_logo($logo)
{
    if( is_page(2854) ) {
		$logo = "/wp-content/uploads/logo1.png";
	}
    return $logo;
}

add_filter('avf_logo_link','av_change_logo_url');
function av_change_logo_url($url)
{
	if( is_page(2854) ) {
       return "link url here";
	}
}

is there a possibility to combine these rules ? Rikard

btw. you can insert here every conditional tag you know even arrays:
f.e.

add_filter('avf_logo','av_change_logo');
function av_change_logo($logo)
{
    if( is_page( array( 42, 54, 6 ) ) ){
		$logo = "/wp-content/uploads/logo1.png";
	}
    return $logo;
}

add_filter('avf_logo_link','av_change_logo_url');
function av_change_logo_url($url)
{
	if( is_page( array( 42, 54, 6 ) ) ){
       return "link url here";
	}
}

if ( is_singular( 'event' ) || is_search() || is_category() || is_page() && !is_page(1307) || is_singular( 'portfolio' ) )
etc pp works all

btw:

Note: There is no function to check if a page is a sub-page in wordpress codex – but
we can get around the problem if we make a new function :

function is_tree($pid) {   
	global $post;       
		if(is_page()&&($post->post_parent==$pid||is_page($pid))) 
               return true;
		else 
               return false;
};

than you can use it like:

than we can use conditional tag if it is page id 2 or is subpage of page id 2

if (is_tree(2)) {
  do something
}

PS : only works with one level it does not check if a page is sub sub page !!!

Either it is not so important or you changed it and you forgot to response or it is to complicated . So if we had input we can clarify those settings

I have a similar need to combine these rules.

So is the following a proper syntax to have the logo show up on page 483 and on all posts under the category music, it doesn’t seem to work for me?

add_filter('avf_logo','av_change_logo');
function av_change_logo($logo)
{
    if(is_page(483) || is_category('music') )  {
    $logo = "/wp-content/uploads/2015/12/music-horiz.png";
    }
    return $logo;
}

add_filter('avf_logo_link','av_change_logo_link');
function av_change_logo_link($link)
{
    if(is_page(483) || is_category('music') ){
    $link = "/music/";
    }
    return $link;
}

Thank you Guenni007

I did try it, but the code only replaces the logo on the page 483, however it does not replace the logo on the category

Thank you so much “has” was the answer!

All set!

Thank you all for your help.

For reference, the code that worked is:

add_filter('avf_logo','av_change_logo');
function av_change_logo($logo)
{
    if(is_page(483) || has_category('music') )  {
    $logo = "/wp-content/uploads/2016/12/music-horiz.png";
    }
    return $logo;
}

add_filter('avf_logo_link','av_change_logo_link');
function av_change_logo_link($link)
{
    if(is_page(483) || has_category('music') ){
    $link = "/music/";
    }
    return $link;
}