Help: \n in php

1

I am using php 5.2.3 and I need some help to use

eg:

 
<?php
 
$string = 'PHP & Information Security';
printf("Original string: %s
", $string);
printf("MD5 hash: %s
", md5($string));
printf("SHA-1 hash: %s
", sha1($string));
 
?>

[FONT=Garamond]php.ini configuration[/FONT]