Question

text file in window, each line end with \r\n, in unix, each line end with \n.
Does textarea’s post value follow this rule?

Answer 1

a modified function I’ve used from php.net commetns to replace \n and \r into one
{or whatever you pass in}

function replaceNewLines($string,$replacement='<br />') 
{ 
    return preg_replace("/(\r\n)+|(\n|\r)+/", $replacement, $string); 
} 

$string = "this is \n\n\n a String with many \n\n\r\r returns!"; 

$string = replaceNewLines($string,'');