php中用gd库怎么做出太极的图案，求代码

看代码

	$w = 500;
	$h = 500;
	$img = imageCreate($w,$h);
	imageColorAllocate($img,230,230,230);
	$white = imageColorAllocate($img,255,255,255);
	$black = imageColorAllocate($img,0,0,0);
	imageFilledArc($img,250,250,500,500,0,360,$black,IMG_ARC_PIE);
	imageFilledArc($img,250,250,500,500,90,270,$white,IMG_ARC_PIE);

	imageFilledArc($img,250,375,250,250,0,360,$black,IMG_ARC_PIE);
	imageFilledArc($img,250,125,250,250,0,360,$white,IMG_ARC_PIE);

	imageFilledArc($img,250,375,50,50,0,360,$white,IMG_ARC_PIE);
	imageFilledArc($img,250,125,50,50,0,360,$black,IMG_ARC_PIE);

	header("content-type:image/png");
	imagePNG($img);
?>

这是我刚发布的，带注释的

http://www.xstnet.com/article-77.html

这是效果图

煮豆燃豆萁,豆在釜中泣.