How to match a pound (#) symbol in a regex in php (for hashtags)

Question

Very simple, I need to match the # symbol using a regex. I\'m working on a hashtag detector.

I\'ve tried searching in google and in stack overflow. One

Answer 1

# does not have any special meaning in a regex, unless you use it as the delimiter. So just put it straight in and it should work.

Note that \b detects a word boundary, and in #abc, the word boundary is after the # and before the abc. Therefore, you need to use the \b is superfluous and you just need #\w\w+.