<?php
/**
 * Purge varnish cache for a url.
 *
 * @param array $url_pieces
 *   An array of pieces to look for, or regexes.
 */
function ugc_varnish_purge_pieces(array $url_pieces) {
  $regex = implode('(/.*|$)', $url_pieces);
  ugc_varnish_purge($regex);
}

function ugc_varnish_purge($regex) {
  _ugc_varnish_terminal_run("purge req.url ~ $regex");
}