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<?php $str = "\n\n\nABC\n\nDEF\nGHI\n\n\nJKL"; preg_match_all('~\n+|.+\n?~', $str, $matches); print_r(array_map(function($i) {return strtr($i, "\n", "#");},$matches[0]));
Output for git.master, git.master_jit, rfc.property-hooks
Array ( [0] => ### [1] => ABC# [2] => # [3] => DEF# [4] => GHI# [5] => ## [6] => JKL )

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