(PHP3 , PHP4 )

ImageColorTransparent -- Define a color as transparent


int imagecolortransparent (int im [, int col])

ImageColorTransparent() sets the transparent color in the im image to col. Im is the image identifier returned by ImageCreate() and col is a color identifier returned by ImageColorAllocate().

The identifier of the new (or current, if none is specified) transparent color is returned.