Conditional site title links in Genesis

In the Genesis Facebook group a user asks:

Hi all–I am modifying a genesis sample child theme. I am looking for a way to modify the site title URL so that depending on what header image is displayed depends on what URL is linked to that header image. I’m using the WP Display Header plugin that allows me to determine which header image is displayed on a page, but that does not change the underlying site URL. The reason for this is that I have a site area that will be restricted and I would like it if the special header for that restricted area would go to that area’s central page, rather than the unrestricted home page, if that makes sense. I’ve found some PHP code that might do the trick, but I don’t want to change the site URL globally, just on a per page basis.

We can create a URL type custom field using Custom Field Suite plugin, set it to appear when editing Pages and when a custom URL has been entered, link the site title element (.site-title a) of that particular Page to the specified URL using the genesis_seo_title filter hook in Genesis.

Backend:

Frontend:

Pages for which no custom site title URL has been set and other pages of the site will continue to link the site title to its default, the site’s permalink.

Step 1

Install and activate Custom Field Suite.

Step 2

Go to All Field Groups and create a custom field group having a Site Title Link field (set the return type i.e., Output format to PHP array).

Step 3

Edit your Page(s) and enter your custom URLs for the site title.

Step 4

Add the following in child theme’s functions.php:

add_filter( 'genesis_seo_title', 'custom_site_title_link', 10, 3 );
/**
 * Set Site Title hyperlink to that of `site_title_link` custom field on Pages.
 * @param  string $title  Existing page title.
 * @param  string $inside Markup inside the title.
 * @param  string $wrap   Wrapping element for the title.
 * @return string         Existing / Modified title.
 */
function custom_site_title_link( $title, $inside, $wrap ) {
    // if this is not a static Page, abort.
    if ( ! is_page() ) {
        return $title;
    }

    // get the array of input values for `site_title_link` custom field.
    $link = CFS()->get( 'site_title_link' );

    // if a custom Site Title Link has been set for this Page, set the site title link to it.
    if ( $link['url'] ) {
        $inside = sprintf( '<a href="%s">%s</a>', $link['url'], get_bloginfo( 'name' ) );

        // Build the title.
        $title = genesis_markup( array(
            'open'    => sprintf( "<{$wrap} %s>", genesis_attr( 'site-title' ) ),
            'close'   => "</{$wrap}>",
            'content' => $inside,
            'context' => 'site-title',
            'echo'    => false,
            'params'  => array(
                'wrap' => $wrap,
            ),
        ) );
    }

    // return the current title or title with modified hyperlink.
    return $title;
}

References:

genesis/lib/structure/header.php

http://customfieldsuite.com/field-types/hyperlink.html