PHP - Manual: SolrCollapseFunction::__toString
2024-11-14
(PECL solr >= 2.2.0)
SolrCollapseFunction::__toString — Returns a string representing the constructed collapse function
Returns a string representing the constructed collapse function
此函数没有参数。
官方地址:https://www.php.net/manual/en/solrcollapsefunction.tostring.php