PHP - Manual: SolrCollapseFunction::getNullPolicy
2024-12-22
(PECL solr >= 2.2.0)
SolrCollapseFunction::getNullPolicy — Returns null policy
Returns null policy used or null
此函数没有参数。
官方地址:https://www.php.net/manual/en/solrcollapsefunction.getnullpolicy.php