for the download forced, when I save the file it has some extra html test. my code

<?php                                                                 
header('Content-type: text/plain');                              
header('Content-Disposition: attachment; filename="abc.txt"'); 
echo "test";                                             
?> 

Ben kaydederken bu ben ne var

<script language="javascript">
// some garbage

//-->
</script>

test

Ben sadece testi istiyorum.