1: 
     

2:     
裁剪之前

3:     

4: 

5: 
     

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

7: 

8: /*

9: *图片裁剪

10: *@param string $filename   图片的url

11: *@param int    $width      图片裁剪宽度

12: *@param int    $height     图片裁剪高度

13: *@param int    $x          裁剪图片左边开始的位置

14: *@param int    $y          裁剪图片顶边开始的位置

15: */

16: function cut($filename,$x,$y,$width,$height)

17: {

18:     /*获取图像资源，需要裁剪的图片*/

19:     $image = imagecreatefrompng($filename);

20: 

21:     /*以新的大小创建画布，保存裁剪后的图片*/

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

23: 

24:     /*使用imagecopyresampled缩放*/

25:     imagecopyresampled($image_p, $image, 0, 0, $x, $y, $width, $height, $width, $height);

26: 

27:     /*保存裁剪后的图片和命名*/

28:     imagepng($image_p,'test1.png');

29: 

30:     /*释放资源*/

31:     imagedestroy($image_p);

32:     imagedestroy($image);

33: }

34: /*调用函数*/

35: cut('1.png',20,20,80,80);

36: ?>

37: 
     

38:     
裁剪之后

39:     

40: 

1: 
     

2:     
没有水印

3:     

4: 

5: 
     

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

7: 

8: /*

9: *给背景图片添加水印,背景图片格式png,水印格式gif

10: *@param string $filename   图片的url

11: *@param string $water      水印图片

12: */

13: function watermark($filename,$water)

14: {

15:     /*获取原图的大小*/

16:     list($b_w,$b_h) = getimagesize($filename);

17: 

18:     /*获取水印图片的大小*/

19:     list($w_w,$w_h) = getimagesize($water);

20: 

21:     /*在背景图片中放水印图片的随机起始位置*/

22:     $posX =rand(0,($b_w - $w_w));

23:     $posY =rand(0,($b_h - $w_h));

24: 

25:     /*获取图像资源，需要裁剪的图片*/

26:     $back = imagecreatefrompng($filename);

27:     $water =  imagecreatefromgif($water);

28: 

29:     /*使用Inagecopy函数复制水印图片到指定位置*/

30:     imagecopy($back, $water, $posX, $posY, 0, 0, $w_w, $w_h);

31: 

32:     /*保存带水印的图片和命名*/

33:     imagepng($back,'test2.png');

34: 

35:     /*释放资源*/

36:     imagedestroy($back);

37:     imagedestroy($water);

38: }

39: /*调用函数*/

40: watermark('1.png','test.gif');

41: ?>

42: 
     

43:     
加上水印

44:     

45: