我有一种情况，我必须比较动态数组，并仅获取前四个键具有相似值的数组的计数。例如：
Array[0]
(
[item] => 1
[size] => 1
[pair] => 1
[pay] => 1
[name] =>
[msg] =>
[email] =>
[b19e19b13682bcfef93651c86f9ad9e6] => eih6j74035oj17bvnses32km23
)
Array[1]
(
[item] => 1
[size] => 2
[pair] => 1
[pay] => 1
[name] =>
[msg] =>
[email] =>
[b19e19b13682bcfef93651c86f9ad9e6] => eih6j74035oj17bvnses32km23
)
Array[2]
(
[item] => 1
[size] => 2
[pair] => 2
[pay] => 2
[name] =>
[msg] =>
[email] =>
[b19e19b13682bcfef93651c86f9ad9e6] => eih6j74035oj17bvnses32km23
)
Array[3]
(
[item] => 1
[size] => …