Different logo in a certain page/post

different_logo.php

add_filter('tc_logo_src' ,'my_logo');
function my_logo($logo_src){
    if ( ! is_singular() )
        return;

    $mylogo_src = array(
        //page_or_post id => url
        '31' => 'http://',
        '4' => 'http:// ' 
    );
    $current_id = get_the_ID();
    
    if ( array_key_exists($current_id, $mylogo_src) )
        return $mylogo_src[$current_id];

    return $logo_src;
}