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

You don't need to escape it (it's probably the \b that's throwing it off):

if (preg_match('/^\w+#(\w+)/', 'abc#def', $matches)) {
    print_r($matches);
}

/* output of $matches:
Array
(
    [0] => abc#def
    [1] => def
)
*/