make two line in php code example

Example 1: php multiple line string

//use EOD function for multiple line variable
$variable=<<<EOD
  this is line1
  this is line2
  EOD;

Example 2: 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 3: php new line

echo "\n";
# it only works in double quotes