WeberDev.com -> PHP Manual -> Inserts HTML line breaks before all newlines in a string

string nl2br ( string $string , bool $is_xhtml )

Returns string with '<br />' or '<br>' inserted before all newlines.

string: The input string.
is_xhtml: Whenever to use XHTML compatible line breaks or not (defaults to TRUE).

Returns the altered string.

Example #1 using nl2br()

 <?php
echo nl2br("foo isn't\n bar");
?>

The above example will output:

  foo isn't<br />  bar

Example #2 Generating valid HTML markup using the is_xhtml parameter

 <?php
echo nl2br("Welcome\r\nThis is my HTML document", false);
?>

The above example will output:

  Welcome<br> This is my HTML document

Version	Description
5.3.0	Added the `is_xhtml` parameter.
4.0.5	nl2br() is now XHTML compliant. All older versions will return `string` with '<br>' inserted before newlines instead of '<br />'.

nl2br