Is it possible to achieve the desired result of customizing Google search result icons using PHP alone, or are additional tools or methods required?

To customize Google search result icons using PHP alone, additional tools or methods may be required. One possible approach is to use PHP to generate a custom XML sitemap that includes image URLs for each search result. This sitemap can then be submitted to Google Search Console to influence the display of icons in search results.

// Example PHP code to generate a custom XML sitemap with image URLs
$sitemap = '<?xml version="1.0" encoding="UTF-8"?>
<urlset xmlns="http://www.sitemaps.org/schemas/sitemap/0.9">
<url>
    <loc>https://www.example.com/page1</loc>
    <image:image>
        <image:loc>https://www.example.com/image1.jpg</image:loc>
    </image:image>
</url>
<url>
    <loc>https://www.example.com/page2</loc>
    <image:image>
        <image:loc>https://www.example.com/image2.jpg</image:loc>
    </image:image>
</url>
</urlset>';

// Save the sitemap to a file
file_put_contents('custom_sitemap.xml', $sitemap);

// Submit the sitemap to Google Search Console for indexing
// This step requires manual submission through the Search Console interface