3v4l.org

run code in 150+ php & hhvm versions
Bugs & Features
<?php $str = '#helloworld #test #video #youtube Bon Iver are the best daily surprise :D'; preg_match_all('/#([^\s]+)/', $str, $matches); $hashtags = implode(',', $matches[1]); var_dump($hashtags);
Output for 4.3.0 - 5.6.28, hhvm-3.10.0 - 3.12.0, 7.0.0 - 7.1.0
string(29) "helloworld,test,video,youtube"