function imageWaterMark($groundImage,$waterPos=0,$waterImage="",$waterText="",$textFont=5,$textColor="#FF0000")

{

$isWaterImage = FALSE;

$formatMsg = "暂不支持该文件格式，请用图片处理软件将图片转换为GIF、JPG、PNG格式。";

//读取水印文件

if(!empty($waterImage) && file_exists($waterImage))

{

$isWaterImage = TRUE;

$water_info = getimagesize($waterImage);

$water_w    = $water_info[0];//取得水印图片的宽

$water_h    = $water_info[1];//取得水印图片的高

switch($water_info[2])//取得水印图片的格式

{

case 1:$water_im = imagecreatefromgif($waterImage);break;

case 2:$water_im = imagecreatefromjpeg($waterImage);break;

case 3:$water_im = imagecreatefrompng($waterImage);break;

default:die($formatMsg);

}

}

//读取背景图片

if(!empty($groundImage) && file_exists($groundImage))

{

$ground_info = getimagesize($groundImage);

$ground_w    = $ground_info[0];//取得背景图片的宽

$ground_h    = $ground_info[1];//取得背景图片的高

switch($ground_info[2])//取得背景图片的格式

{

case 1:$ground_im = imagecreatefromgif($groundImage);break;

case 2:$ground_im = imagecreatefromjpeg($groundImage);break;

case 3:$ground_im = imagecreatefrompng($groundImage);break;

default:die($formatMsg);

}

}

else

{

die("需要加水印的图片不存在！");

}

//水印位置

if($isWaterImage)//图片水印

{

$w = $water_w;

$h = $water_h;

$label = "图片的";

}

else//文字水印

{

$temp = imagettfbbox(ceil($textFont*2.5),0,"c:/windows/fonts/stcaiyun.ttf",$waterText);//取得使用 TrueType 字体的文本的范围

$w = $temp[2] - $temp[6];

$h = $temp[3] - $temp[7];

unset($temp);

$label = "文字区域";

}

if( ($ground_w

{

echo "需要加水印的图片的长度或宽度比水印".$label."还小，无法生成水印！";

return;

}

switch($waterPos)

{

case 0://随机

$posX = rand(0,($ground_w - $w));

$posY = rand(0,($ground_h - $h));

break;

case 1://1为顶端居左

$posX = 0;

$posY = 0;

break;

case 2://2为顶端居中

$posX = ($ground_w - $w) / 2;

$posY = 0;

break;

case 3://3为顶端居右

$posX = $ground_w - $w;

$posY = 0;

break;

case 4://4为中部居左

$posX = 0;

$posY = ($ground_h - $h) / 2;

break;

case 5://5为中部居中

$posX = ($ground_w - $w) / 2;

$posY = ($ground_h - $h) / 2;

break;

case 6://6为中部居右

$posX = $ground_w - $w;

$posY = ($ground_h - $h) / 2;

break;

case 7://7为底端居左

$posX = 0;

$posY = $ground_h - $h;

break;

case 8://8为底端居中

$posX = ($ground_w - $w) / 2;

$posY = $ground_h - $h;

break;

case 9://9为底端居右

$posX = $ground_w - $w;

$posY = $ground_h - $h;

break;

default://随机

$posX = rand(0,($ground_w - $w));

$posY = rand(0,($ground_h - $h));

break;

}

//设定图像的混色模式

imagealphablending($ground_im, true);

if($isWaterImage)//图片水印

{

imagecopy($ground_im, $water_im, $posX, $posY, 0, 0, $water_w,$water_h);//拷贝水印到目标文件

}

else//文字水印

{

if( !empty($textColor) && (strlen($textColor)==7) )

{

$R = hexdec(substr($textColor,1,2));

$G = hexdec(substr($textColor,3,2));

$B = hexdec(substr($textColor,5));

}

else

{

die("水印文字颜色格式不正确！");

}

imagestring ( $ground_im, $textFont, $posX, $posY, $waterText, imagecolorallocate($ground_im, $R, $G, $B));

}

//生成水印后的图片

@unlink($groundImage);

switch($ground_info[2])//取得背景图片的格式

{

case 1:imagegif($ground_im,$groundImage);break;

case 2:imagejpeg($ground_im,$groundImage);break;

case 3:imagepng($ground_im,$groundImage);break;

default:die($errorMsg);

}

//释放内存

if(isset($water_info)) unset($water_info);

if(isset($water_im)) imagedestroy($water_im);

unset($ground_info);

imagedestroy($ground_im);

}

//---------------------------------------------------------------------------------------

if(isset($_FILES) && !empty($_FILES['userfile']) && $_FILES['userfile']['size']>0)

{

$uploadfile = "./".time()."_".$_FILES['userfile']['name'];

if (copy($_FILES['userfile']['tmp_name'], $uploadfile))

{

echo "OK
";

//文字水印

//     imageWaterMark($uploadfile,9,"./trtt.png","www.zg700.com",5,"#FF0000");

//图片水印

$waterImage="./shuiyin.png";//水印图片路径

imageWaterMark($uploadfile,0,$waterImage);

echo "";

}

else

{

echo "Fail
";

}

}

?>

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