add rel=”sponsored ” to all old affiliate links in my site

hi everyone

i need to add the rel=”sponsored” attribute to old affiliate links in my websites as google said to avoid algorithmic penalty ,

Most of those links were created as buttons using the Shortcodes Ultimate plugin.

i tried this code in the snippet plugin:

function add_sponsored_rel_attribute($content) {
// Define an array of allowed domain keywords
$allowed_domain_keywords = array(
‘amazon’,
‘jumia’
// Add more keywords as needed
);

// Add rel="sponsored" to external links for domains containing allowed keywords
$content = preg_replace_callback(
    '/<a[^>]+href=[\'"]([^\'"]+)[\'"][^>]*>/i',
    function ($matches) use ($allowed_domain_keywords) {
        $link_url = $matches[1];

        // Check if the link is external
        $link_domain = parse_url($link_url, PHP_URL_HOST);

        // Check if the link's domain contains any allowed keyword
        foreach ($allowed_domain_keywords as $keyword) {
            if (stripos($link_domain, $keyword) !== false) {
                // Add rel="sponsored"
                return '<a href="' . $link_url . '" rel="sponsored">';
            }
        }

        return $matches[0];
    },
    $content
);

return $content;

}

// Hook the function to the_content filter
add_filter(‘the_content’, ‘add_sponsored_rel_attribute’);
add_filter(‘widget_text_content’, ‘add_sponsored_rel_attribute’);

——————————-

the above code works fine for all external links containing the keywords i provided in the code.

but it doesn’t work for the external links were created buttons in from the Shortcodes Ultimate plugin ??

i tried differents codes, but all were unable to add the rel=”sponsored” attribute to the Shortcodes Ultimate Buttons?

please help me.