note 119276 added to function.nl2br

This is example with "\R" regex token which matches any unicode newline character. "u" flag treate strings as UTF-16. Which is optional, depending on your use case. <?php public function nl2br($string) { return preg_replace('/\R/u', '<br/>', $string); } ?> NOTE: preg_replace versions are much slower than using str_replace version or built-in nl2br. Check out pcre.backtrack_limit php.ini setting for information about PCRE limit. It's good to know. Some PHP7 benchmarks: <?php // nl2br() function nl2br_str($string) { return str_replace(["\r\n", "\r", "\n"], '<br/>', $string); } function nl2br_preg_R($string) { return preg_replace('/\R/u', '<br/>', $string); } function nl2br_preg_rnnr($string) { return preg_replace('/(\r\n|\n|\r)/', '<br/>', $string); } ?> # nl2br ## Time: 0.02895712852478 s # nl2br_str ## Time: 0.027923107147217 s # nl2br_preg_R ## Time: 0.13350105285645 s # nl2br_preg_rnnr ## Time: 0.14213299751282 s ---- Server IP: 72.52.91.14 Probable Submitter: 195.14.183.214 ---- Manual Page -- http://php.net/manual/en/function.nl2br.php Edit -- https://master.php.net/note/edit/119276 Del: integrated -- https://master.php.net/note/delete/119276/integrated Del: useless -- https://master.php.net/note/delete/119276/useless Del: bad code -- https://master.php.net/note/delete/119276/bad+code Del: spam -- https://master.php.net/note/delete/119276/spam Del: non-english -- https://master.php.net/note/delete/119276/non-english Del: in docs -- https://master.php.net/note/delete/119276/in+docs Del: other reasons-- https://master.php.net/note/delete/119276 Reject -- https://master.php.net/note/reject/119276 Search -- https://master.php.net/manage/user-notes.php