Ds\Set::diff » « Ds\Set::copy PHP 手册 函数参考 其它基本扩展 Data Structures Set Ds\Set::count (PECL ds >= 1.0.0)Ds\Set::count — Returns the number of values in the set See Countable::count() add a note User Contributed Notes There are no user contributed notes for this page. 备份地址:http://www.lvesu.com/blog/php/ds-set.count.php