$img = imagecreatefrompng("./dir/subdir/image.png");<img src="<?php "$img"; ?>" />
<?php
/* $img_path is your image's location; on most hosts, the contents of public_html would be your root directory and, for sanity, images would be stored in their own directory. */
$img_path = "http://www.yourdomain.com/images/img_000.png";
/* Then you generate the HTML and plop your PHP in */
?>
<!-- Make sure you use the .php extension on your filename and have PHP running -->
<img src="<?php echo $img_path; ?>" />
<!-- You can take this concept even further by abstracting everything so that you can reuse code. But you'll find out about that as you go along -->