Showing mb_strlen and mb_substr for 火车票

Using str_split: Array ( [0] => [1] => [2] => [3] => [4] => [5] => [6] => [7] => [8] => )

Using mb_str_split: Array ( [0] => 火 [1] => 车 [2] => 票 )

Using mb_strlen and mb_substr: Array ( [0] => 火 [1] => 车 [2] => 票 )