Question

Possible Duplicate:
Regex to conditionally replace Twitter hashtags with hyperlinks

I’m trying to get the word after the symbol #

so the following strings, should all return stack_overflow

#stack_overflow
hello #stack_overflow
blahblahblah#stack_overflow

What would the pattern look like?

Answer 1

\w matches a “word” character, so:

'/#\w+/'

\w includes lowercase and uppercase letters a to z, digits, and the underscore. If you need more, use a character set.

Then, if you put it in a group, you can capture it. Here’s a demo.