how to go to a new line in php code example

Example 1: new line in php

<?php
echo "Hello world this is example \r\n in php.";
echo "<br>";
echo nl2br("You will find the \n newlines in this string \r\n on the browser window.");
?>

Example 2: php new line

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