php：將字符串拆分爲數組作爲分隔符

Question

如何將$str拆分爲任何拉丁字母爲分隔符的部分？

$str = "  Hello! How are you? How are you doing? "; 

應返回

$arr = ("  ", "! ", " ", " ", "? ", " ", " ", " ", "? "); 

Answer 1

陣列使用正則表達式。在1個或更多字符+或a-z分裂A-Z：

$arr = preg_split('/[a-zA-Z]+/', $str); 

在字符類添加任何你想要的0-9的數字或'的撇號等這樣[] ...