function waterText($filename,$text="ceshi2",$fontfile="simhei.ttf")
{
    $fileInfo=getimagesize($filename);
    $mime=$fileInfo['mime'];
    $createFun=str_replace("/","createfrom",$mime);
    $outFun=str_replace("/",null,$mime);
    $image=$createFun($filename);
    $color=imagecolorallocatealpha($image,255,0,0,50);
    $fontfile="../fonts/{$fontfile}";
    imagettftext($image,14,0,0,14,$color,$fontfile,$text);
//    header("content-type:".$mime);
    $outFun($image,$filename);
    imagedestory($image);
}

function doWaterText($id)
{
    $rows=getProImgsById($id);
   foreach ($rows as $row)
    {
        $filename="../image_800/".$row['albumPath'];
        waterText($filename);
    }
    $mes="操作成功";
    return $mes;
}