nl2br

j dot mons54 at gmail dot com (2012-05-29 21:45:48)

for bbcode :

<?php
$message =  nl2br(preg_replace('#(\\]{1})(\\s?)\\n#Usi', ']', stripslashes($message)));
?>

mail at fort-hub dot com (2011-02-18 03:54:40)

I noticed that I am using an earlier version of PHP which does not recognise the $xhtml parameter in nl2br(), therefore I am stuck with xhtml line breaks, which I do not want. Thus I made the following simple function:

<?php

    function NlToBr($inString)
    {
        return preg_replace("%\n%", "<br>", $inString);
    }

?>

Joshua Anderson (2010-06-11 21:40:35)

This function will change new lines (line breaks) to <br/> and it allows you to limit the amount of brs allowed at any point in time.

This function was made to avoid people spaming a textarea with hundreds of line breaks or empty lines.

<?php 
function nl2br_limit($string, $num){
    
$dirty = preg_replace('/\r/', '', $string);
$clean = preg_replace('/\n{4,}/', str_repeat('<br/>', $num), preg_replace('/\r/', '', $dirty));
    
return nl2br($clean);
}

echo nl2br_limit($string,'4');
?>

// Heres how it works //

nl2br_limit($string, $num)
// $string is the entered text you want to strip lines out of, it could be ($_POST['myinput'])
// $num is the amount of consecutive <br/>'s that are allowed any at a time.

The user is allowed to enter as many line breaks as $num allows

N/A (2008-10-29 07:41:41)

Here's a more simple one:

<?php
/**
 * Convert BR tags to nl
 *
 * @param string The string to convert
 * @return string The converted string
 */
function br2nl($string)
{
    return preg_replace('/\<br(\s*)?\/?\>/i', "\n", $string);
}
?>

Enjoy

blacknine313 at gmail dot com (2008-04-01 18:34:36)

After a recent post at the forums on Dev Shed, I noticed that it isn't mentioned, so I will mention it.
nl2br returns pure HTML, so it should be after PHP anti-HTML functions ( such as strip_tags and htmlspecialchars ).

hyponiq at gmail dot com (2007-08-25 23:03:24)

On the contrary, <b>mark at dreamjunky.comno-spam</b>, this function is rightfully named. Allow me to explain. Although it does re-add the line break, it does so in an attempt to stay standards-compliant with the W3C recommendations for code format.
According to said recommendations, a new line character must follow a line break tag. In this situation, the new line is not removed, but a break tag is added for proper browser display where a paragraph isn't necessary or wanted.

ngkongs at gmail dot com (2007-02-23 04:12:39)

to replace all linebreaks to <br />
the best solution (IMO) is:

<?php
function nl2br2($string) {
$string = str_replace(array("\r\n", "\r", "\n"), "<br />", $string);
return $string;
}
?>

because each OS have different ASCII chars for linebreak:
windows = \r\n
unix = \n
mac = \r

works perfect for me

Anders Norrbring (2006-03-09 13:28:48)

Seeing all these suggestions on a br2nl function, I can also see that neither would work with a sloppy written html line break.. Users can't be trusted to write good code, we know that, and mixing case isn't too uncommon.

I think this little snippet would do most tricks, both XHTML style and HTML, even mixed case like <Br> <bR /> and even <br            > or <br     />.

<?php
function br2nl($text)
{
    return  preg_replace('/<br\\s*?\/??>/i', '', $text);
}
?>

CGameProgrammer at gmail dot com (2005-01-30 17:28:13)

It's important to remember that this function does NOT replace newlines with <br> tags. Rather, it inserts a <br> tag before each newline, but it still preserves the newlines themselves! This caused problems for me regarding a function I was writing -- I forgot the newlines were still being preserved.

If you don't want newlines, do:

<?php
$Result = str_replace( "\n", '<br />', $Text );
?>