new line starts php

1. <?php  
2.     echo nl2br("New line will start from here\n in this string\r\n on the browser window");  
3. ?>  

New line will start from here
in this string
on the browser window

<?php  
    echo "One line after\n another line";  
    echo " One line after\r\n another line";  
?>  





One line after another line One line after another line