PHP实现绘制3D扇形统计图及图片缩放实例

  <"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);
  $darkgray = imagecolorallocate($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*/
  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, $darknavy, IMG_ARC_PIE);
  imagefilledarc($image, 50, 50, 100, 50, 40, 75, $darkgray, IMG_ARC_PIE);
  imagefilledarc($image, 50, 50, 100, 50, 75, 200, $darkred, IMG_ARC_PIE);
 
  /*画字符串*/
  imagestring($image, 3, 15, 55, "30%", $white);
  imagestring($image, 3, 45, 35, "60%", $white);
  imagestring($image, 3, 60, 60, "10%", $white);
 
  /*输出图像*/
  header("content-type:image/png");
  imagepng($image);
 
  /*释放资源*/
  imagedestroy($image);
  "" src="/UploadFiles/2021-04-02/2014101150723309.png">

2、对图片进行缩放


  <div>
    <h4>原图大小</h4>
    <img src="/UploadFiles/2021-04-02/1.png">

效果：