I would like to change the home_url for a custom post type that I have created.

The reason I would like to change the home_url is so that the site logo then links to a different URL when someone is viewing a custom post.

The custom post type is named 'usa', therefore I want to change the logo / home url to link to mysite/usa/

I have used the code below to achieve this, however I get errors because other links that make use of home_url, such as menu links, then have 'usa' appended to them, e.g mysite/usa/example-post/usa/

Does someone know a better implementation?

add_filter( 'home_url', 'custom_home_url' );

function custom_home_url( $url )
{
if( is_singular('us') )
    return $url .'/usa';
    else {
            return $url;
    }

}

I would like to change the home_url for a custom post type that I have created.

The reason I would like to change the home_url is so that the site logo then links to a different URL when someone is viewing a custom post.

The custom post type is named 'usa', therefore I want to change the logo / home url to link to mysite/usa/

I have used the code below to achieve this, however I get errors because other links that make use of home_url, such as menu links, then have 'usa' appended to them, e.g mysite/usa/example-post/usa/

Does someone know a better implementation?

add_filter( 'home_url', 'custom_home_url' );

function custom_home_url( $url )
{
if( is_singular('us') )
    return $url .'/usa';
    else {
            return $url;
    }

}

• custom-post-types
• filters

• You could just use JS to change the links on page load? – Ashtmdu Commented Oct 13, 2017 at 14:22
• Are you using template files for this USA CPT? – Ashtmdu Commented Oct 13, 2017 at 14:24
• No at the moment I'm just using a plugin to implement and then working off the standard template files. – user102297 Commented Oct 13, 2017 at 15:57
• See your problem is that you can't really ascertain what does and doesn't use home_url in your functions.php and therefore, you can't pick which one should use the new URL instead of the original. What I would suggest is putting your code in the default header template file (where the menu code is). You can use the is_singular() to check if you're on the right page to swap the link. Does that make sense? – Ashtmdu Commented Oct 13, 2017 at 16:06
• Yes that does make sense. Thanks for your header example below, I will test it. – user102297 Commented Oct 14, 2017 at 8:18

2 Answers 2

Your filter generally seems fine.

I'd probably filter option_home instead of home_url, but it results in the same thing for most use cases (bloginfo("home") will work and so will get_home_url(), but get_option("home") will only work correctly with option_home).

I would suggest putting this in the file that contains your menu code, the header file usually. You can just check the page on load to see if the page your on needs the USA appending to the link.

Here is an example that could be used for any element within a page.

HEADER.PHP

<?php
if( is_singular('us') ) { 
  $url = site_url( '/usa/' );
} else { 
  $url = site_url();
}
?>
<nav>
  <a href="<?php echo $url; ?>" class="logo">MY LOGO</a>
</nav>

site_url() by default will just give you your website URL but it can also take an extra $path parameter to append to the end of the URL. This is why I have put '/usa/' inside site_url() above.