1: 
     

2: header("content-type","text/html;charset=utf-8");

3: /*扇形统计图*/

4: $image = imagecreatetruecolor(100, 100);    /*创建画布*/

5:

6: /*设置画布需要的颜色*/

7: $white = imagecolorallocate($image,0xff,0xff,0xff);

8: $gray = imagecolorallocate($image, 0xc0, 0xc0, 0xc0);

9: $darkgray = imagecolorallocate($image, 0x90, 0x90, 0x90);

10: $navy = imagecolorallocate($image, 0x00, 0x00, 0x80);

11: $darknavy = imagecolorallocate($image, 0x00, 0x00, 0x50);

12: $red = imagecolorallocate($image, 0xff, 0x00, 0x00);

13: $darkred = imagecolorallocate($image, 0x90, 0x00, 0x00);

14:

15: /*填充背景色*/

16: imagefill($image, 0, 0, $white);

17:

18: /*3D制作*/

19: for($i = 60; $i > 50; $i--)

20: {

21:     imagefilledarc($image, 50, $i, 100, 50, -160, 40, $darknavy, IMG_ARC_PIE);

22:     imagefilledarc($image, 50, $i, 100, 50, 40, 75, $darkgray, IMG_ARC_PIE);

23:     imagefilledarc($image, 50, $i, 100, 50, 75, 200, $darkred, IMG_ARC_PIE);

24: }

25: /*画椭圆弧并填充*/

26: imagefilledarc($image, 50, 50, 100, 50, -160, 40, $darknavy, IMG_ARC_PIE);

27: imagefilledarc($image, 50, 50, 100, 50, 40, 75, $darkgray, IMG_ARC_PIE);

28: imagefilledarc($image, 50, 50, 100, 50, 75, 200, $darkred, IMG_ARC_PIE);

29:

30: /*画字符串*/

31: imagestring($image, 3, 15, 55, "30%", $white);

32: imagestring($image, 3, 45, 35, "60%", $white);

33: imagestring($image, 3, 60, 60, "10%", $white);

34:

35: /*输出图像*/

36: header("content-type:image/png");

37: imagepng($image);

38:

39: /*释放资源*/

40: imagedestroy($image);

41: ?>

1: 
     

2:     
原图大小

3:     

4: 

5: 
     

6: header("content-type","text/html;charset=utf-8");

7:

8: /*

9: *图片缩放

10: *@param string $filename   图片的url

11: *@param int    $width      设置图片缩放的最大宽度

12: *@param int    $height     设置图片缩放的最大高度

13: */

14: function thumb($filename,$width=130,$height=130)

15: {

16:     /*获取原图的大小*/

17:     list($width_orig,$height_orig) = getimagesize($filename);

18:

19:     /*根据参数$width和$height，换算出等比例的高度和宽度*/

20:     if($width && ($width_orig < $height_orig))

21:     {

22:         $width = ($height / $height_orig) * $width_orig;

23:     }

24:     else

25:     {

26:         $height = ($width / $width_orig) * $height_orig;

27:     }

28:

29:     /*以新的大小创建画布*/

30:     $image_p = imagecreatetruecolor($width, $height);

31:

32:     /*获取图像资源*/

33:     $image = imagecreatefrompng($filename);

34:

35:     /*使用imagecopyresampled缩放*/

36:     imagecopyresampled($image_p, $image, 0, 0, 0, 0, $width, $height, $width_orig, $height_orig);

37:

38:     /*保存缩放后的图片和命名*/

39:     imagepng($image_p,'test.png');

40:

41:     /*释放资源*/

42:     imagedestroy($image_p);

43:     imagedestroy($image);

44: }

45: /*调用函数*/

46: thumb('1.png');

47: ?>

48: 
     

49:     
缩放后的大小

50:     

51: