\n\n

H

ello
進   撃の巨人!

\nrandom code\nrandom code\n

Lorem ipsum.

\n\n "; $begin = 'Hello 進撃の巨人!'; $end = 'Lorem ipsum.'; $begin = preg_replace_callback('~\s++(?!\z)|(\s++\z)~u', function ($m) { return !empty($m[1]) ? '' : ' '; }, $begin); $end = preg_replace_callback('~\s++(?!\z)|(\s++\z)~u', function ($m) { return !empty($m[1]) ? '' : ' '; }, $end); $begin_arr = preg_split('~(?=\X)~u', $begin, -1, PREG_SPLIT_NO_EMPTY); $end_arr = preg_split('~(?=\X)~u', $end, -1, PREG_SPLIT_NO_EMPTY); $reg = "(?s)(?:<[^<>]+>)?(?:&#?\\w+;)*\\s*" . implode("", array_map(function($x, $k) use ($begin_arr) { return ($k < count($begin_arr) - 1 ? preg_quote($x, "~") . "(?:\s*(?:<[^<>]+>|&#?\\w+;))*" : preg_quote($x, "~"));}, $begin_arr, array_keys($begin_arr))) . "(.*?)" . implode("", array_map(function($x, $k) use ($end_arr) { return ($k < count($end_arr) - 1 ? preg_quote($x, "~") . "(?:\s*(?:<[^<>]+>|&#?\\w+;))*" : preg_quote($x, "~"));}, $end_arr, array_keys($end_arr))); //echo $reg .PHP_EOL; preg_match('~' . $reg . '~u', $html, $m); print_r($m[0]);