复制代码 代码如下:

//原始图像

$dst = "/upload/20120914/20120914040740-0.jpg"; //注意图片路径要正确

//得到原始图片信息

$dst_info = getimagesize($dst);

switch ($dst_info[2])

{

case 1:

$dst_im =imagecreatefromgif($dst);break;

case 2:

$dst_im =imagecreatefromjpeg($dst);break;

case 3:

$dst_im =imagecreatefrompng($dst);break;

case 6:

$dst_im =imagecreatefromwbmp($dst);break;

default:

die("不支持的文件类型1");exit;

}

//水印图像

$src = "/images/shuiyin.png"; //注意路径要写对

$src_info = getimagesize($src);

switch ($src_info[2])

{

case 1:

$src_im =imagecreatefromgif($src);break;

case 2:

$src_im =imagecreatefromjpeg($src);break;

case 3:

$src_im =imagecreatefrompng($src);break;

case 6:

$src_im =imagecreatefromwbmp($src);break;

default:

die("不支持的文件类型1");exit;

}

//半透明格式水印

//$alpha = 50;//水印透明度

//imagecopymerge($dst_im,$src_im,$dst_info[0]-$src_info[0]-10,$dst_info[1]-$src_info[1]-10,0,0,$src_info[0],$src_info[1],$alpha);

//支持png本身透明度的方式

imagecopy($dst_im,$src_im,$dst_info[0]-$src_info[0]-10,$dst_info[1]-$src_info[1]-10,0,0,$src_info[0],$src_info[1]);

//保存图片

switch ($dst_info[2]){

case 1:

imagegif($dst_im,$dst);break;

case 2:

imagejpeg($dst_im,$dst);break;

case 3:

imagepng($dst_im,$dst);break;

case 6:

imagewbmp($dst_im,$dst);break;

default:

die("不支持的文件类型2");exit;

}

imagedestroy($dst_im);

imagedestroy($src_im);