regex multiline modifier and windows line endings

In regex, ^ and $ shoudl match start/end of a line when the 'm' /multiline
modifier is set -- however I just spent the better part of the day trying
to figure out why it wasn't working as expected. I used the query
test$
....and the text
test
test
test

Only the last instance of test would match -- that is expected without the
multiline flag. ( http://tinyurl.com/dx86w ) however they should each
match with the multiline flag so long as there's no additional whitespace
after the fact ( http://tinyurl.com/7bap6 ).

Finally, out of ideas, I replaced \r\n with \n on all of my _POST data --
and presto, it worked. So, my question is -- why won't it work on data
with windows line endings? Is there a built in function for changing the
line ending style or something? It seems there should be a more elegant
solution than running a find/replace on all of my user-input just to make
sure the line ending style are liked by PCRE.

Thanks

A.

re: regex multiline modifier and windows line endings

On Tue, 31 Jan 2006 15:41:47 -0500, Allen wrote:
[color=blue]
>
> In regex, ^ and $ shoudl match start/end of a line when the 'm' /multiline
> modifier is set -- however I just spent the better part of the day trying
> to figure out why it wasn't working as expected. I used the query
> test$
> ...and the text
> test
> test
> test
>
> Only the last instance of test would match -- that is expected without the
> multiline flag. ( http://tinyurl.com/dx86w ) however they should each
> match with the multiline flag so long as there's no additional whitespace
> after the fact ( http://tinyurl.com/7bap6 ).
>
> Finally, out of ideas, I replaced \r\n with \n on all of my _POST data --
> and presto, it worked. So, my question is -- why won't it work on data
> with windows line endings? Is there a built in function for changing the
> line ending style or something? It seems there should be a more elegant
> solution than running a find/replace on all of my user-input just to make
> sure the line ending style are liked by PCRE.
>
> Thanks
>
> A.[/color]


Allen, I've never encountered such problem because I normally
clean up all "\r" characters, whenever I encounter them,
but there is a parameter "auto_detect_line_endings" in your php.ini
which is normally set to "Off".

--
http://www.mgogala.com

re: regex multiline modifier and windows line endings

On Fri, 03 Feb 2006 07:40:04 -0500, Mladen Gogala <gogala@sbcglobal.net>
wrote:
[color=blue]
> On Tue, 31 Jan 2006 15:41:47 -0500, Allen wrote:
>
>
> Allen, I've never encountered such problem because I normally
> clean up all "\r" characters, whenever I encounter them,
> but there is a parameter "auto_detect_line_endings" in your php.ini
> which is normally set to "Off".[/color]

That'll probably do it. In my code, I never use \r -- the problem was
from user-input, which hadn't occurred to me to manually clean up. Thanks
much.