php生成水印，包括位置和透明度(9)

                    $posX = $old_w - $water_w;

                    $posY = $old_h - $water_h;

                    break;

                default: //随机

                    $posX = rand(0,($old_w - $water_w));

                    $posY = rand(0,($old_h - $water_h));

                    break;

                }

            // 设定图像的混色模式

                imagealphablending($oldimg, true);

                // 添加水印

                imagecopymerge($oldimg, $waterimg, $posX, $posY, 0, 0, $water_w,$water_h,$pct);

                $fun = 'image'.$type;

                !@$fun($oldimg, $filename,100) && die('保存失败!检查目录是否存在并且可写?');

                  imagedestroy($oldimg);

                  imagedestroy($waterimg);

                  return $filename;

        }

}

$imgs=new image();

$tempFile = "./images/hdb.jpg";

$water = "./images/bamiluo.jpg";

$imgs->param($tempFile);

//if(!$imgs->thumb($targetFile,600,500))die('fail');

$imgs->water($targetFile,$water,0,10);

echo "aaa";

?>

摘自：ws07_byyy的专栏