(PHP 3, PHP 4 >= 4.0.0)
ImageFillToBorder -- Flood fill to specific color
Description
int 
imagefilltoborder ( int im, int x, int y, int border, int col)
     ImageFillToBorder() performs a flood fill
     whose border color is defined by border.
     The starting point for the fill is x,
     y (top left is 0, 0) and the region is
     filled with color col.