PHP fwrite new line

Question

I\'m trying to write username and password to a new line in a txt file. The output should be something like this in the txt file. I know this is not very secure but its just

Answer 1

Use PHP_EOL which produces \r\n or \n

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

// File output

my data
my data