Analysis of utf strings in php regular expression matching

Analysis of utf strings in php regular expression matching

Today, I used php to match Chinese characters. I tried several methods and found that I only needed to add a/u pattern after our pattern. The following is an excerpt from the php manual:
This modifier enables additional features that are not compatible with Perl in a PCRE. The pattern string is treated as a UTF-8. This modifier is available in Unix from PHP 4.1.0 and win32 from PHP 4.2.3. Check the validity of the UTF-8 in the mode from PHP 4.3.5.

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