/**
* Clear the page item cache.
*
* @param int $pageNumber
* @return \Zend\Paginator\Paginator
*/
public function clearPageItemCache($pageNumber = null)
{
if (!$this->_cacheEnabled()) {
return $this;
}
if (null === $pageNumber) {
foreach (self::$_cache->getIdsMatchingTags(array($this->_getCacheInternalId())) as $id) {
if (preg_match('|' . self::CACHE_TAG_PREFIX . "(\\d+)_.*|", $id, $page)) {
self::$_cache->remove($this->_getCacheId($page[1]));
}
}
} else {
$cleanId = $this->_getCacheId($pageNumber);
self::$_cache->remove($cleanId);
}
return $this;
}
