Solve the problem of verifying Chinese characters using php regular expressions

Solve the problem of verifying Chinese characters using php regular expressions

$ Str = '123456789abcdefg of the People's Republic of China '; Echo preg_match ("/^ [\ u4e00-\ u9fa5_a-zA-Z0-9] {} $", $ strName ); ?> Run the above code and the prompt will be: Warning: preg_match (): Compilation failed: PCRE does not support \ L, \ l, \ N, \ P, \ p, \ U, \ u, or \ X at offset 3 in F: \ wwwroot \ php \ test. php on line 2 The reason is that the following Perl escape sequences are not supported in PHP regular expressions: \ L, \ l, \ N, \ P, \ p, \ U, \ u, or \ X In UTF-8 mode, '\ x {...}' is allowed, and the content in braces is a string that represents a hexadecimal number. The original hexadecimal escape sequence \ xhh matches a dubyte UTF-8 character if its value is greater than 127. Solution: preg_match ("/^ [\ x80-\ xff_a-zA-Z0-9] {} $", $ strName ); For example: /** * Php regular expression to verify Chinese characters * Edit bbs.it-home.org */ $ Shouji = "hahaha "; If (! Preg_match ("/^ [\ x80-\ xff] {6, 30} $/", $ shouji )){ Echo "nonono "; } Else { Echo "yesyesyes "; } ?>