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标题:PHP如何绘制3D扇形统计图表及图片缩放的实例代码（imagecreatetruecolor）
正文:
1、利用php gd库的函数绘制3D扇形统计图 <?php header("content-type","text/html;charset=utf-8"); /*扇形统计图@camnpr*/ $image = imagecreatetruecolor(100, 100); /*创建画布*/ /*设置画布需要的颜色*/ $white = imagecolorallocate($image,0xff,0xff,0xff); $gray = imagecolorallocate($image, 0xc0, 0xc0, 0xc0); $darkgray = imagecolorallocate($image, 0x90, 0x90, 0x90); $navy = imagecolorallocate($image, 0x00, 0x00, 0x80); $darknavy = imagecolorallocate($image, 0x00, 0x00, 0x50); $red = imagecolorallocate($image, 0xff, 0x00, 0x00); $darkred = imagecolorallocate($image, 0x90, 0x00, 0x00); /*填充背景色*/ imagefill($image, 0, 0, $white); /*3D制作@郑州网建*/ for($i = 60; $i > 50; $i--) { imagefilledarc($image, 50, $i, 100, 50, -160, 40, $darknavy, IMG_ARC_PIE); imagefilledarc($image, 50, $i, 100, 50, 40, 75, $darkgray, IMG_ARC_PIE); imagefilledarc($image, 50, $i, 100, 50, 75, 200, $darkred, IMG_ARC_PIE); } /*画椭圆弧并填充*/ imagefilledarc($image, 50, 50, 100, 50, -160, 40, $darknavy, IMG_ARC_PI
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