bool imagechar ( resource image, int font, int x, int y, string c, int color )
imagechar() draws the first character of
c in the image identified by
image with its upper-left at
x,y (top left is 0,
0) with the color color. If font
is 1, 2, 3, 4 or 5, a built-in font is used (with higher numbers
corresponding to larger fonts).