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*/
$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 = i