How to bypass Cloudflare cache with Wordpress

how-to-bypass-cloudflare-cache-with-wordpress.php

<?php

/*
 - Admin users will get a different URL with a bypass argument.
 - The original clean URL will be cached in CloudFlare without the admin bar.
 - The bypass URL argument ensures that CloudFlare shows you the most recent version of the page/data.
*/
function efAddByPassParamToUrl($url)
{
    $time = time();

    if (strpos($url, '?') === FALSE){
        return $url . '?bypass=' . $time;
    }

    return $url . '&bypass=' . $time;
}

if (is_admin()) {
    add_action('post_link', 'efAddByPassParamToUrl');
    add_action('page_link', 'efAddByPassParamToUrl');
    add_action('year_link', 'efAddByPassParamToUrl');
    add_action('month_link', 'efAddByPassParamToUrl');
    add_action('day_link', 'efAddByPassParamToUrl');
    add_action('term_link', 'efAddByPassParamToUrl');
    add_action('search_link', 'efAddByPassParamToUrl');
    add_action('post_type_archive_link', 'efAddByPassParamToUrl');
    add_action('preview_post_link', 'efAddByPassParamToUrl');
}