imagefilltoborder
    (PHP 3, PHP 4, PHP 5)
imagefilltoborder -- Flood fill to specific color
Description
bool 
imagefilltoborder ( resource image, int x, int y, int border, int color )
     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 color.