Forums Scripts & Popups $regex

i have a problem with $regex,
$regex(#blah,\b#blah\b) returns 0 and it shouldn't becuz
$regex(blah,\bblah\b) returns 1, i think there is a problem when putting a "#" does any1 know what's the problem??

"#" is NOT a 'word' char, so in effect it IS a boundary. Use /(^|\s)#blah\b/

kthx
hmm can u tell me what is a word char ?
and what is IS ?

A "word" char is a letter, digit or underscore.

"IS" is an uppercase "is" , the present tense of "was", you know?

hehe
what's underscore ??

_ <-- That's an underscore

gotcha
10x

hmm, another thing,
can u explain me better about the \b becuz i can't figure out how it works?

Straight from PCRE man page

\b word boundary
\B not a word boundary
\A start of subject (independent of multiline mode)
\Z end of subject or newline at end (independent of
multiline mode)
\z end of subject (independent of multiline mode)

These assertions may not appear in character classes (but
note that "\b" has a different meaning, namely the backspace
character, inside a character class).

A word boundary is a position in the subject string where
the current character and the previous character do not both
match \w or \W (i.e. one matches \w and the other matches
\W), or the start or end of the string if the first or last
character matches \w, respectively.