how do i make a line break in fwrite()

[just-j]

i want to do somthing like this..

fwrite($fo, this is NEWLINE);
fwrite($fo, a test NEWLINE);

and make the out come "
this is
a test
"
and not "
this isa test
"

[designationlocutus]

Does \n work?

[just-j]

with fwrite($fo, $towrite \n);
i get Warning: Unexpected character in input: '\' (ASCII=92) state=1 in C:\wamp5\www\tbbc\forum\write.php on line 25

Parse error: parse error, unexpected T_STRING in C:\wamp5\www\tbbc\forum\write.php on line 25

[king arthur]

Try fwrite($fo, $towrite . "\n");

[just-j]

i did the fwrite($fo, $towrite . "\n");  and it dosent break to a new line in the .txt file..  it just adds this little block every where the \n is and keeps the text on the same line.  if i echo the .txt with php, then php recognises those blocks as line breaks  but that does me no good for what im tring to accomplish. 

[king arthur]

Then try a carriage return character too: "\r\n".