IMG_ARC_PIE draws a filled wedge shape with a curved edge
IMG_ARC_CHORD draws a straight line between the starting and ending angles
IMG_ARC_NOFILL draws the outside edge line without drawing the two lines toward the center of the arc
IMG_ARC_EDGED draws an unfilled wedge shape with a curved edge
imagefilledarc($image, 200, 150, 200, 200, 345, 15, $green,IMG_ARC_CHORD | IMG_ARC_NOFILL);
imagefilledarc($image, 200, 150, 200, 200, 345, 15, $green,IMG_ARC_EDGED | IMG_ARC_NOFILL);
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