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<?php function getHashtags($string) { $hashtags= FALSE; preg_match_all("/(#\w+)/u", $string, $matches); if ($matches) { $hashtagsArray = array_count_values($matches[0]); var_dump($hashtagsArray); $hashtags = array_keys($hashtagsArray); } return $hashtags; } var_export( getHashtags( 'Valid hashtags include: #hashtag #NYC2016 #foo #NYC_2016 #gøypålandet! #foo #bar #cat #cat #cat #cat' ) );

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