找一个UTF-8字符串的空格，我需要mb_strpos吗？

Question

I have a string in UTF-8.

$string = "ãçé êíõ";

I need to find the position of the space. I have to use mb_strpos($string,' '); ?

Answer 1

If you want to find the character position of the space, then yes. strpos will not do because the byte value 0x20 (UTF-8 code point for space) can also be encountered as part of a code point encoded over multiple bytes.

Also, do not forget to specify the encoding -- either explicitly on the mb_strpos call or by setting a default with mb_internal_encoding.