(PHP 4 >= 4.0.6, PHP 5, PHP 7, PHP 8)

imagecolorexactalphaRetorna o índice da cor especificada + transparencia


    resource $image,
    int $red,
    int $green,
    int $blue,
    int $alpha
): int

Retorna o índice da cor especificada + transparencia na paleta da imagem especificada.

Se a cor não existir na paleta de imagem, é retornado -1.

Veja também imagecolorclosestalpha().

add a note

User Contributed Notes 2 notes

matt at matt-darby dot com
18 years ago
Note that a color allocated with imagecolorexactalpha won't show alpha (it will be opaque) when used with imageline(). Use imagerectangle() set to your normal start and end points instead.

Ensure that the image is created via imagecreatetruecolor() as well!
phpdoc-comment at aditus dot nu
20 years ago
What might be misleading in the docs is that if the specified color + alpha channel does not exist it will be created. So if you like to use an alpha channel in your image enable alpha blending and then create you color using this method.
To Top