How to implement automatic redirection when WordPress search results are unique

Have we seen that in some WP themes, when searching for content, if the result is only one record, it will automatically jump to this record. This kind of experience will be better. Do you know how to achieve these effects?

//Search the only jump By https://www.cnwper.com/wpsearch-301.html
add_action('template_redirect', 'redirect_single_post');
function redirect_single_post() {
if (is_search()) {
 global $wp_query;
if ($wp_query->post_count == 1 && $wp_query->max_num_pages == 1) {
wp_redirect( get_permalink( $wp_query->posts['0']->ID ) );
 exit;
}
}
}

Here, we can put the code into the functions.php file and automatically achieve this effect.

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