Why is the TXT file having problems using file_put_contents?

Question

I am creating files with the "file_put_contents" function of PHP, on my machine it opens normal in Notepad++, but when sending to someone and it will open in ultra Edit it asks "Do you want to Convert 'file.txt' to DOS format?"

The function I’m using in a simple way

$dados  = "Olá mundo!";
file_put_contents("arquivo.txt", $dados, FILE_APPEND);

How to fix it, I’ve looked on the web but I haven’t seen anything I might be doing wrong.

Error screen:

Answer 1

See if this solves your problem:

<?php 

$dados  = "Olá mundo!";
$copy_utf16 = iconv("UTF-8", "UTF-16LE", $dados);
file_put_contents("arquivo.txt", $copy_utf16, FILE_APPEND);

?>

Look at Soen’s question