/**
* Clear by tags
*
* @param CachePoolInterface $cache
* @param string $tag tag
* @return bool
* @access public
*/
public function clearByTag(CachePoolInterface $cache, $tag)
{
// get tagItem for $tag
$tagKey = $this->getTagKey($tag);
$tagItem = $cache->getItem($tagKey);
// read array of keys from $tagItem
if ($tagItem->isHit()) {
$keyArray = $tagItem->get();
foreach (array_keys($keyArray) as $key) {
if ($cache->deleteItem($key)) {
unset($keyArray[$key]);
}
}
// get error
if (count($keyArray)) {
$this->setError($cache->getError(), $cache->getErrorCode());
}
// update tagItem
$tagItem->set($keyArray);
$tagItem->expiresAfter($this->tag_life);
// one year
$cache->save($tagItem);
if (count($keyArray)) {
return false;
}
}
return $this->trueAndFlushError();
}
