UTF-8 characters don't display correctly

Question

This is my PHP code:

Answer 1

try this:

    header('Content-Type: text/html; charset=UTF-8');
    header("Content-type: application/octetstream");
    header("Pragma: no-cache");
    header("Expires: 0");
    //print "$name_field\n$data";

    // با این کد درست شد
    print chr(255) . chr(254) . mb_convert_encoding("$name_field\n$data", 'UTF-16LE', 'UTF-8');