86. php 绘图体系(2)

<?php

//1.画布
//默认是黑色
$img = imagecreatetruecolor(400,300);
$white = imagecolorallocate($img,255,255,255);
imagefill($img,0,0,$white);

//2.画扇形
//创建3个颜色
$red = imagecolorallocate($img,255,0,0);
$blue = imagecolorallocate($img,0,0,128);
$gray = imagecolorallocate($img,192,192,192);
//暗色
$dardred = imagecolorallocate($img,144,0,0);
$dardblue = imagecolorallocate($img,0,0,80);
$dardgray = imagecolorallocate($img,144,144,144);

for($i=60;$i>=40;$i--){
imagefilledarc($img,100,$i,100,60,0,35,$dardblue,IMG_ARC_PIE);
imagefilledarc($img,100,$i,100,60,35,75,$dardgray,IMG_ARC_PIE);
imagefilledarc($img,100,$i,100,60,75,360,$dardred,IMG_ARC_PIE);
}

//在上面加个盖，亮色
imagefilledarc($img,100,40,100,60,0,35,$blue,IMG_ARC_PIE);
imagefilledarc($img,100,40,100,60,35,75,$gray,IMG_ARC_PIE);
imagefilledarc($img,100,40,100,60,75,360,$red,IMG_ARC_PIE);

//输出图片
header('content-type:image/png');
imagepng($img);
imagedestroy($img);