imagecolortransparent
Description
int imagecolortransparent ( resource image [, int color] )
Sets the transparent color in the given image.
Parameters
imageAn image resource, returned by one of the image creation functions, such as imagecreatetruecolor().
colorA color identifier created with imagecolorallocate()
Return Values
The identifier of the new (or current, if none is specified) transparent color is returned.
Notes
Note: Transparency is copied only with imagecopymerge() and true color images, not with imagecopy() or pallete images.
Note: The transparent color is a property of the image, transparency is not a property of the color. Once you have set a color to be the transparent color, any regions of the image in that color that were drawn previously will be transparent.
