Skip to Main Content
PHP in a Nutshell
book

PHP in a Nutshell

by Paul Hudson
October 2005
Intermediate to advanced content levelIntermediate to advanced
372 pages
11h 35m
English
O'Reilly Media, Inc.
Content preview from PHP in a Nutshell

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
Become an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
and much more.
Start your free trial

You might also like

PHP Cookbook

PHP Cookbook

Eric A. Mann
Programming PHP

Programming PHP

Rasmus Lerdorf, Kevin Tatroe
Learning PHP

Learning PHP

David Sklar

Publisher Resources

ISBN: 0596100671Errata Page