Clear user cache shortcode

<?php
/**
 * Plugin Name: Swift Performance Tweaks
 */


add_shortcode('swift_clear_user_cache', function(){
    $current_page = site_url(str_replace(home_url(), '', 'http'.(isset($_SERVER['HTTPS']) ? 's' : '') . '://' . Swift_Performance::$http_host . $_SERVER['REQUEST_URI']));
    return '<a href="' . wp_nonce_url($current_page, 'swift-clear-user-cache', 'swift-clear-user-cache') . '">Clear user cache</a>';
});

add_action('init', function(){
    if (isset($_REQUEST['swift-clear-user-cache']) && wp_verify_nonce($_REQUEST['swift-clear-user-cache'], 'swift-clear-user-cache') && class_exists('Swift_Performance_Cache')){
        Swift_Performance_Cache::clear_user_cache(get_current_user_id());
    }
});

?>