gistfile1.txt

<?php

add_action('template_redirect', 'one_match_redirect');
function one_match_redirect() {
    if (is_search()) {
        global $wp_query;
        if ($wp_query->post_count == 1) {
            wp_redirect( get_permalink( $wp_query->posts['0']->ID ) );
            exit();
        }
        if ($wp_query->post_count == 0) {
            wp_redirect( 'https://officeinmalta.com/' );
            exit();
        }
    }
}