#30382 [Asn->Bgs]: preg_match and utf-8

ID: 30382 Updated by: tony2001@php.net Reported By: TiloLutz at gmx dot de -Status: Assigned +Status: Bogus Bug Type: PCRE related Operating System: Suse Linux 9.1 PHP Version: 4.3.9 Assigned To: derick New Comment: PCRE has limited UTF-8 support. "A class is matched against a UTF-8 character instead of just a single byte, but it can match only characters whose values are less than 256. Characters with greater values always fail to match a class." (c) man pcre No bug in PHP -> bogus. Previous Comments: ------------------------------------------------------------------------ [2004-12-06 22:08:02] pmichaud at pobox dot com It might help to know that PCRE doesn't support the [:alpha:], [:digit:], etc. classes in UTF-8 mode. From http://www.pcre.org/pcre.txt, under "POSIX CHARACTER CLASSES": In UTF-8 mode, characters with values greater than 128 do not match any of the POSIX character classes. So, the fact that [:alpha:] doesn't work on UTF-8 strings appears to be a limitation of PCRE itself. (And I do so strongly wish it were otherwise.) Pm ------------------------------------------------------------------------ [2004-10-11 13:00:20] derick@php.net I can reproduce it too, but I need to think real hard about it first before I can say whether it is correct or not :) ------------------------------------------------------------------------ [2004-10-11 12:40:36] chregu@php.net I can reproduce it on Debian, but not on Mac OS X ------------------------------------------------------------------------ [2004-10-11 11:41:34] TiloLutz at gmx dot de You can find an example at http://www.stud.uni-karlsruhe.de/~usjp/preg_match.zip The file is 100% encoded as utf8. ------------------------------------------------------------------------ [2004-10-11 08:01:17] derick@php.net This depends on how the ä is encoded in your script. If it's just iso-8859-1 then it won't work. No bug here unless you can come up with an example that works. (Post a link to a zip file containing your scripts). ------------------------------------------------------------------------ The remainder of the comments for this report are too long. To view the rest of the comments, please view the bug report online at http://bugs.php.net/30382 -- Edit this bug report at http://bugs.php.net/?id=30382&edit=1