note 108828 added to function.nl2br

can someone explain why str_replace() behaves like the below: $str = "foo\r\nbar"; 1) echo str_replace('\r'.'\n',"<br/>",$str); prints: foo bar 2) echo str_replace("\r\n","<br/>",$str); prints: foo\r\nbar ---- Server IP: 69.147.83.197 Probable Submitter: 59.182.41.39 ---- Manual Page -- http://www.php.net/manual/en/function.nl2br.php Edit -- https://master.php.net/note/edit/108828 Del: integrated -- https://master.php.net/note/delete/108828/integrated Del: useless -- https://master.php.net/note/delete/108828/useless Del: bad code -- https://master.php.net/note/delete/108828/bad+code Del: spam -- https://master.php.net/note/delete/108828/spam Del: non-english -- https://master.php.net/note/delete/108828/non-english Del: in docs -- https://master.php.net/note/delete/108828/in+docs Del: other reasons-- https://master.php.net/note/delete/108828 Reject -- https://master.php.net/note/reject/108828 Search -- https://master.php.net/manage/user-notes.php