php nl2br returns br and \n code example

Example 1: nl2br php

because each OS have different ASCII chars for linebreak:
windows = \r\n
unix = \n
mac = \r
  
<?php
echo nl2br("foo isn't\n bar");
?>

Example 2: newline not working php

// When you run a PHP script in a browser, it will be rendered as HTML by default.
// Use <br /> instead or modify the header to content type plain text
echo "Hello <br /> World";