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<?php $comment = '#ああああ　いいいいい #うううう'; preg_match('/#[^　]+(?=　.*(#.*$))/u', $comment, $arr); var_dump($arr);
Output for git.master, git.master_jit, rfc.property-hooks
array(2) { [0]=> string(13) "#ああああ" [1]=> string(13) "#うううう" }

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