Thinkphp中有没有类似java中List.stream().collect(Collectors.groupingBy(TeamRing::getCode))这样的分组方法
把 array（
(1,"张三","小学");
(2,"张三2","小学");
(3,"张三3","中学");
）
变成
array（
"小学"=>array(
(1,"张三","小学");
(2,"张三2","小学");
)
"中学"=>array(
(3,"张三3","中学");
)
）