php加浮水印的代碼(支援半透明透明打浮水印，支援png透明背景)_php執行個體

複製代碼 代碼如下:
//原始映像
$dst = "/upload/20120914/20120914040740-0.jpg"; //注意圖片路徑要正確
//得到原始圖片資訊
$dst_info = getimagesize($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("不支援的檔案類型1");exit;
}
//浮水印映像
$src = "/images/shuiyin.png"; //注意路徑要寫對
$src_info = getimagesize($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("不支援的檔案類型1");exit;
}

//半透明格式浮水印
//$alpha = 50;//浮水印透明度
//imagecopymerge($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);

//支援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]);

//儲存圖片
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,$dst);break;
default:
die("不支援的檔案類型2");exit;
}
imagedestroy($dst_im);
imagedestroy($src_im);

