正则表达式 - PCRE 不支持 \\L、\\l、\\N、\\P、

Question

I need to use the following regular expression to validate some Asian characters

 $regexp = "/^[\-'\u2e80-\u9fff\sa-zA-Z.]+$/"; // with warning

 $regexp = "/^[\-'\sa-zA-Z.]+$/";   // without warning

preg_match() [function.preg-match]: Compilation failed: PCRE does not support \\L, \\l, \\N, \\P, \\p, \\U, \\u, or \\X.

Do you know how to change the regular expression pattern so that I can validate the Asian characters from \⺀-\鿿

I am using the latest XAMPP

Apache/2.2.14 (Win32) DAV/2 mod_ssl/2.2.14 OpenSSL/0.9.8l mod_autoindex_color PHP/5.3.1 mod_apreq2-20090110/2.7.1 mod_perl/2.0.4 Perl/v5.10.1

Thank you

Answer 1

PCRE does not support the \\uXXXX syntax. Use \\x{XXXX} instead. See here .

Your \⺀-\鿿 range is also equivalent to

\\p{InCJK_Radicals_Supplement}\\p{InKangxi_Radicals}\\p{InIdeographic_Description_Characters}\\p{InCJK_Symbols_and_Punctuation}\\p{InHiragana}\\p{InKatakana}\\p{InBopomofo}\\p{InHangul_Compatibility_Jamo}\\p{InKanbun}\\p{InBopomofo_Extended}\\p{InKatakana_Phonetic_Extensions}\\p{InEnclosed_CJK_Letters_and_Months}\\p{InCJK_Compatibility}\\p{InCJK_Unified_Ideographs_Extension_A}\\p{InYijing_Hexagram_Symbols}\\p{InCJK_Unified_Ideographs}

Don't forget to add the u modifier ( /regex here/u ) if you're dealing with UTF-8. If you're dealing with another multi-byte encoding, you must first convert it to UTF-8.

Answer 2

'/^[<\x{4e00}-\x{9fa5}>]+$/u'；

Try this one. The regular expression you posted above is not supported by PHP，but Javascript does support that expression.