php regular Chinese

php matches Chinese with regular expression

1.用.+ 可以匹配到一个以上的中文吗？
2.用这样的 '/你好，哈哈/' 去匹配中文会不会出现问题？

Because I don’t know much about regular expressions, I would like to ask if there will be any encoding problems when matching regular expressions with Chinese characters?

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php matches Chinese with regular expression

1.用.+ 可以匹配到一个以上的中文吗？
2.用这样的 '/你好，哈哈/' 去匹配中文会不会出现问题？

Because I don’t know much about regular expressions, I would like to ask if there will be any encoding problems when matching regular expressions with Chinese characters?

1. can match

2. Using /Hello, haha/, this will only match /Hello, haha/this.... because the two slashes before and after will be treated as normal content..

There are also problems with Chinese encoding. Just like if I use unicode characters to match Chinese with ordinary str type content in Python, it won’t match. I just need to cache the unicode encoding of the content