php：图像处理---立体饼状图

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<?php// 创建图像$image = imagecreatetruecolor(600, 450);// 分配一些颜色$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($image, 0x90, 0x00, 0x00);$green    = imagecolorallocate($image, 0, 200, 0);//填充画布背景颜色；imagefill($image,0,0,$green);// 创建 3D 效果for ($i = 180; $i > 150; $i--) {    imagefilledarc($image, 250, $i, 300, 150, 0, 45, $darknavy, IMG_ARC_PIE);    imagefilledarc($image, 250, $i, 300, 150, 45, 75 , $darkgray, IMG_ARC_PIE);    imagefilledarc($image, 250, $i, 300, 150, 75, 360 , $darkred, IMG_ARC_PIE);}imagefilledarc($image, 250, 150, 300, 150, 0, 45, $navy, IMG_ARC_PIE);imagefilledarc($image, 250, 150, 300, 150, 45, 75 , $gray, IMG_ARC_PIE);imagefilledarc($image, 250, 150, 300, 150, 75, 360 , $red, IMG_ARC_PIE);// 输出图像header('Content-type: image/png');imagepng($image);imagedestroy($image);?>

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