ewebeditor v3.8水印处理位置调整

$ground_info = getimagesize($groundImage); //原图大小获取
 $ground_w = $ground_info[0];//原图宽
 $ground_h = $ground_info[1];//原图高
 $water_w = $water_info[0];
 $water_h = $water_info[1];
  //获取水印的宽和高
//imagecopy($ground_im, $water_im, 0, 0, 0, 0, $water_w, $water_h);//合成图片，这是原来的代码
 //这段代码是Joyous加上的
     $posX = $ground_w – $water_w;
     $posY = $ground_h – $water_h;
 //这段是定位的坐标。
     imagecopy($ground_im, $water_im, $posX, $posY, 0, 0, $water_w, $water_h);//合成图片
可以将位置单独弄出来。如下（其中$w、$h是水印的宽和高）：
 switch($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;    
      }