我有一个以下结构的数组
Array ( [members] => Array (
[0] => Array ( [nr] => 2 [email] => email1 )
[1] => Array ( [nr] => 6 [email] => email2 )
[2] => Array ( [nr] => 3 [email] => email3 )
)
[title] => List members
)
我想通过 nr 删除项目 [3] => Array (),例如 unset [nr] => 3,那么我该怎么做呢?