Correct PHP matching UTF-8 Chinese regular expression_PHP tutorial

Correct PHP matching UTF-8 Chinese regular expression

This article mainly introduces the correct PHP matching UTF-8 Chinese regular expression. This article provides a comparison There are two different regular expressions. Friends who need them can refer to them

I have been using this before

The code is as follows:

preg_match('~[x7f-xff] ~is', $string, $tmp);

I just discovered today that the above will also match characters from some European countries

You should use the following one, pay attention to the modifier u

The code is as follows:

preg_match('~[x{4e00}-x{9fa5}] ~u', $string, $tmp);

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