[RESOLVED] [GD]: open existing image(url) & set a transparent color

[scrupul0us]

lets say i output an image like this:

$img = array('somedomain.com/foo.jpg');

<img src="$img[0]" alt="" />

but it has a white background and i want to strip the white background to be transparent

how do i do that and output it inline again?

[scrupul0us]

i should add this:

<?php
$img = array('somedomain.com/foo.jpg');

$img = imagecreatefromjpeg($img[0]);
imagetruecolortopalette($img, false, 256); // convert

$white = imagecolorresolve($img, 255, 255, 255); // resolve given palette entry
imagecolortransparent($img, $white);

header("Content-type: image/gif");
imagegif($img);
?>

i understand that... but i need it to be displayed inline

[scrupul0us]

got it:

$img = imagecreatefromjpeg('path/to/file.jpg');

$trans = imagecolorallocate($img,255,255,255);
imagecolortransparent($img,$trans);
imagegif($img,'thumb.gif');	
imagedestroy($img);

echo "<img src=\"thumb.gif\" alt=\"\" />";