imagecolorexactalpha

(PHP 4 >= 4.0.6, PHP 5)

imagecolorexactalpha -- Get the index of the specified color + alpha

Description

int imagecolorexactalpha ( resource image, int red, int green, int blue, int alpha )

Returns the index of the specified color+alpha in the palette of the image.

If the color does not exist in the image's palette, -1 is returned.

Note: This function requires GD 2.0.1 or later (2.0.28 or later is recommended).