Grab an old version of GD (one with GIF support), and simply use 
ImageCreateFromGif() followed by ImageLine() and ImageGif() and you are 


On Sun, 11 Nov 2001, Torkil Johnsen wrote:

> Hello.
> I'm looking for sample code on how I can solve this problem:
>  - I have a webpage.
>  - On the webpage I have a map. (gif image)
>  - I have two points on the map: a and b, with coordinates ax,ay and bx,by
>  - Now... I want to create a straight line that is drawn from a to b, and I
> want this line to be displayed on top of the map.
> So I want to make a php-generated line that is drawn upon a gif.
> Maybe it is possible to draw this line inside a layer that is placed upon
> the webpage with a higher z-index that that of the map gif?
> ... any clever minds out there?
> Thanks in advance,
> Torkil Johnsen

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