php newline to br 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: php new line

//let a variable contain multiple line
//add <br> tag in string
$variable = "123 <br> ";