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<?php function gethashtags($text) { //Match the hashtags preg_match_all('/(^|[^a-z0-9_])#([a-z0-9_]+)/i', $text, $matchedHashtags); $hashtag = ''; // For each hashtag, strip all characters but alpha numeric if(!empty($matchedHashtags[0])) { foreach($matchedHashtags[0] as $match) { $hashtag[] = preg_replace("/[^a-z0-9]+/i", "", $match); } } //to remove last comma in a string //return rtrim($hashtag, ','); return $hashtag; } //usage $text = "w3lessons.info - "; print_R(gethashtags($text));
Output for git.master, git.master_jit, rfc.property-hooks

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