php为图片加水印的代码

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php为图片加水印的代码
<?php 
  $source=imagecreatefromjpeg('E:/image/guide_pic.jpg'); 
  $thumb=imagecreatefromjpeg('E:/image/l.JPG'); 
//取得图片的宽度,高度,类型 
  list($width,$height,$mine)=getimagesize('E:/image/guide_pic.jpg'); 
  imagecopymerge ($source,$thumb,$width-124,$height-150,0,0,88,73,70); 
//生成图片 
  imagejpeg($source,'E:/image/logo.jpg'); 
?>