WordPress Gravatar ALT tag error fixing for SEO

To fix alt tag missing shown on SEO report for Gravatar image we can simply add the following code on functions.php file.

function wp_gravatar_alt($wpGravatar) {
    if (have_comments()) {
        $alt = get_comment_author();
    }
    else {
        $alt = get_the_author_meta('display_name');
    }
    $wpGravatar = str_replace('alt=\'\'', 'alt=\'Avatar for ' . $alt . '\' title=\'Gravatar for ' . $alt . '\'', $wpGravatar);
    return $wpGravatar;
}
add_filter('get_avatar', 'wp_gravatar_alt');

Source : https://crunchify.com/are-you-missing-wordpress-gravatar-alt-value-how-to-fix-tag-does-not-have-an-alt-attribute-defined-seo-error/

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