Match hastags?

PHP
1

How can I check if the hash tag contains special character and if so show error please help?

$message = "#test/ #test* #*test #t*test";

preg_match_all('/(#\w+)/', $message, $matches);
foreach ($matches[1] as $hashtag)

$hashtag = preg_replace('/[^A-Za-z0-9\-]/', '', $hashtag);




if ($hashtag && !preg_match("/^[0-9a-zA-Z ]+$/", $hashtag))
{
    $post->set_error("ERROR - Hash tag can't contain special characters!");
}
2

Looks like solved it with this regular expression:

/(#\S+)/
3

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