How to determine a string that needs to be UTF8 decoded

Question

如果需要在PHP中解码UTF8，是否有可能检查字符串？

Answer 1

You can use mb_detect_encoding to check if the string is already encoded in UTF-8:

mb_detect_encoding($str, 'UTF-8', true)

This returns false if the string is not valid UTF-8.

Answer 2

您可以使用确定字符串是否使用UTF-8编码

 mb_detect_encoding($str, 'UTF-8');