[PHP] Image output (Newb question)

[Fidencio Monroy]

Hi, I need to display some PNG pictures in a script; from help I got
 
$im = imagecreatefrompng("images/map.png");
imagepng($im);
 
It outputs the binary data as a string, kind of trash; what do I need to set
to tell the browser how to interpret it?
 
 Thanks.
 
 
Fidencio Monroy.