October 2005
Intermediate to advanced
372 pages
11h 35m
English
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Adding Transparency
Specifying the part of an image that should be transparent is as simple as picking the color to use as transparent and passing it into the imagecolortransparent() function. As the support for transparency
in some browsers (notably with Internet Explorer and PNG transparency) is limited, this function is most useful when the transparent image is used as part of a larger image so that the transparency can be seen.
$image = imagecreatetruecolor(400,400);
$black = imagecolorallocate($image, 0, 0, 0);
imagecolortransparent($image, $black);
/// rest of picture here