Bug #11461 Updated: \. after \- does not work

ID: 11461 Updated by: rasmus@php.net Reported By: aweber@multamedio.de Status: Bogus Bug Type: Regexps related Operating System: Linux 2.2.16-SMP PHP Version: 4.0.6RC3 New Comment: PHP does support ARE and again, this is not the issue here. Previous Comments: ------------------------------------------------------------------------ [2002-05-15 07:50:41] webmaster@linuxconfig.de Maybe you shoud include both types and let the user decide with of them he wants to use. ------------------------------------------------------------------------ [2002-05-15 07:49:15] alxwe@t-online.de It depends whether you use the Extended Regular Expressions (as PHP does at the moment) or the Advanced Regular Expressions which have much more features. Both are defined by POSIX. Using ARE constructs like [0-9A-Za-z_\-\.] are right. If you want a "\" whithin the brackets you have to write "\\". The AREs are much easier to use and are more conclusive than the ERE. ------------------------------------------------------------------------ [2002-05-14 19:30:17] rasmus@php.net No I didn't. The problem has nothing to do with ^ vs. [^ The question is whether \- is a valid way to get a literal - inside []'s ------------------------------------------------------------------------ [2002-05-14 16:05:56] postings.php.net@hans-spath.de @rasmus: It sounds like you've mistaken "^" for "[^" ... http://sunsite.utk.edu/gnu/regex/regex_17.html#SEC17 http://sunsite.utk.edu/gnu/regex/regex_23.html#SEC23 ------------------------------------------------------------------------ [2002-05-14 12:31:25] rasmus@php.net A bracket expression is a list of characters enclosed in `[]'. It normally matches any single character from the list (but see below). If the list begins with `^', it matches any single character (but see below) not from the rest of the list. If two characters in the list are sepa­ rated by `-', this is shorthand for the full range of characters between those two (inclusive) in the collating sequence, e.g. `[0-9]' in ASCII matches any decimal digit. It is illegal- for two ranges to share an endpoint, e.g. `a-c-e'. Ranges are very collating-sequence-dependent, and portable programs should avoid relying on them. To include a literal `]' in the list, make it the first character (following a possible `^'). To include a lit­ eral `-', make it the first or last character, or the sec­ ond endpoint of a range. To use a literal `-' as the first endpoint of a range, enclose it in [.' and .]' to make it a collating element (see below). With the excep­ tion of these and some combinations using `[' (see next paragraphs), all other special characters, including `\', lose their special significance within a bracket expres­ sion. ------------------------------------------------------------------------ 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/11461 -- Edit this bug report at http://bugs.php.net/?id=11461&edit=1