IT seem to be impossible as the alpha png is 24 bit and gif can only be 256 color.. however, is there any alternative which at least make the generated transparent gif look good?
this is my code.. but itdin work
<?php
$img1 = imagecreatefrompng('logommu.png');
$back = imagecolorallocate($img1, 255, 255, 255);
imagecolortransparent($img1, $back);
imagetruecolortopalette($img1, true, 255);
header("Content-type: image/gif");
imagegif($img1);
?>
