Working with JPGs
<?php
$animage = imagecreate (200, 200);
$red = imagecolorallocate ($animage, 255, 0, 0);
imagerectangle ($animage, 0, 0, 200, 200, $red);
imagejpeg ($animage);
header ("Content-type: image/jpeg");
imagedestroy ($animage);
?>
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