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 )