Answers for "how to change a line of text in php"

php fwrite new line

$data = 'my data' . PHP_EOL . 'my data';
$fp = fopen('my_file', 'a');
fwrite($fp, $data);
fclose($fp);

newline in php

<?php
 echo nl2br("If you want that '\n' works. \n Then use nl2br() function!");
 echo "<br> can also be used.";
 echo "nl2br() is in-built function whereas <br> is html tag";
?>