Yoast Breadcrumb Parent Page

### 1. **Verify Page Hierarchy in WordPress**
– Go to **Pages > All Pages** in your WordPress admin panel.
– Edit each subpage and check the **Page Attributes** section.
– Ensure that the **Parent Page** is correctly set for all subpages.

### 2. **Check Yoast SEO Breadcrumb Settings**
– Go to **SEO > Search Appearance** in the WordPress admin panel.
– Open the **Breadcrumbs** tab and ensure breadcrumbs are enabled.
– Review the settings for the breadcrumb separator and hierarchy.

### 3. **Update Permalinks**
– Go to **Settings > Permalinks** and click **Save Changes** without making any changes. This refreshes the permalink structure, which might resolve the issue.

### 4. **Enable Yoast Breadcrumb Filters**
Add the following code to your theme's `functions.php` file to ensure Yoast can handle custom breadcrumb behavior:

add_filter('wpseo_breadcrumb_single_link', 'modify_yoast_breadcrumb_links', 10, 2);
   function modify_yoast_breadcrumb_links($link_output, $link) {
       // You can customize breadcrumb links here if needed
       return $link_output;
   }

### 5. **Clear Caches**
If you are using caching plugins or a server-level cache (e.g., Cloudflare), clear the cache after making changes. Cached pages might not reflect the updated breadcrumb structure.

### 6. **Check for Plugin or Theme Conflicts**
– Temporarily switch to a default WordPress theme like Twenty Twenty-Four.
– Disable other plugins except Yoast SEO.
– Check if the breadcrumb issue persists. If not, the problem lies in a conflict with your theme or another plugin.

### 7. **Custom Breadcrumb Trail (if needed)**
If the issue persists, you can create a custom breadcrumb trail using the Yoast SEO breadcrumb shortcode:

if ( function_exists('yoast_breadcrumb') ) {
       yoast_breadcrumb('<p id="breadcrumbs">','</p>');
   }

– Place this code in the appropriate location in your theme, such as `header.php` or `single.php`.

### 8. **Review Subpage Templates**
If you're using custom page templates, ensure the templates include the Yoast breadcrumb code and do not override the breadcrumb functionality.

After applying these steps, check if the parent page appears in the breadcrumb trail for subpages. Let me know if you encounter any specific challenges!

### Add this Code to Your `functions.php` File:

add_filter('wpseo_breadcrumb_links', 'add_parent_page_to_breadcrumb');
function add_parent_page_to_breadcrumb($links) {
    // Get the current post
    if (is_singular('page')) {
        global $post;

        // Check if the current page has a parent
        if ($post->post_parent) {
            // Get the parent page details
            $parent_id = $post->post_parent;
            $parent = get_post($parent_id);

            // Build the parent breadcrumb link
            $parent_link = [
                'url' => get_permalink($parent_id),
                'text' => $parent->post_title,
                'id'   => $parent_id,
            ];

            // Add the parent link before the current page link
            array_splice($links, -1, 0, [$parent_link]);
        }
    }

    return $links;
}

### How It Works:
1. **`is_singular('page')`:** Ensures this only applies to pages, not posts or custom post types.
2. **`$post->post_parent`:** Checks if the current page has a parent.
3. **`get_permalink($parent_id)`:** Gets the URL of the parent page.
4. **`array_splice()`:** Inserts the parent breadcrumb link before the current page in the breadcrumb trail.

### Steps After Adding the Code:
1. Save the changes to your `functions.php` file.
2. Clear any caches (e.g., caching plugin, server cache, or browser cache).
3. Test the breadcrumbs on subpages with parent pages.

The parent page should now appear in the breadcrumb trail before the current page. Let me know if you need further customization!