WordPress Caching for Plugins

WordPress Caching for Plugins — a practical guide to WordPress object cache transient with clear examples you can reuse in real projects.

WordPress Plugin Development Series (70/95). Prefer one article? Read the complete WordPress plugin development tutorial.

Short description

Transients work everywhere; object cache shines with Redis/Memcached. Set sensible TTLs and invalidate on updates.

Transient example

$data = get_transient('acme_remote_data');
if (false === $data) {
    $data = acme_fetch_remote();
    set_transient('acme_remote_data', $data, HOUR_IN_SECONDS);
}