Description:
------------
Example 1 has an invalid parameter count in the documentation.  The line reading ...
$im = imagecreatetruecolor('example.jpg', 100, 100);
... is in error.

Expected result:
----------------
A working example:

<?php
$im = imagecreatetruecolor(100, 100);
// sets background to red
$red = imagecolorallocate($im, 255, 0, 0);
imagefill($im, 0, 0, $red);
header("Content-type: image/png"); 
imagepng($im);
imagedestroy($im);
?>