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<?php
 
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 //$copyFile£º  ´ý¿½±´µÄͼ
 //$resultFile£º  Éú³ÉÎļþ±£´æµØÖ·
 //$copyToX£º  ¿½±´µ½±³¾°Í¼ÉϵÄX×ø±ê
 //$copyToY£º  ¿½±´µ½±³¾°Í¼ÉϵÄY×ø±ê
 //$copyToWidth£º °Ñ´ý¿½±´µÄͼ±äΪ¶à¿í
 //$copyToHeight£º °Ñ´ý¿½±´µÄͼ±äΪ¶à¸ß
 function ImgMerge($backFile,$copyFile,$resultFile,$copyToX,$copyToY,$copyToWidth,$copyToHeight)
 {
  //Èç¹ûÎļþÃûºó׺²»ÊÇ"PNG"Ôò·µ»Ø""
  if (GetFileUpperExt($backFile) != "PNG")
   return "";
  //Èç¹ûÎļþÃûºó׺²»ÊÇ"PNG"Ôò·µ»Ø""
  if (GetFileUpperExt($copyFile) != "PNG")
   return "";
  $backImg = ImageCreateFromPng($backFile);
  //Èç¹ûֵûÓÐÉèÖÃ,Ôò·µ»Ø""
  if (!isset($backImg ))
  {
   return "";
  }
  $backImgX = ImageSX($backImg);
  $backImgY = ImageSX($backImg);
 
  $copyImg = ImageCreateFromPng($copyFile);
  //Èç¹ûֵûÓÐÉèÖÃ,Ôò·µ»Ø""
  if (!isset($copyImg ))
  {
   return "";
  }
  $copyResizeImg = ImageResize($copyImg,$copyToHeight);
 
  $bCopy = ImageCopy($backImg,$copyResizeImg,$copyToHeight);
  if (!$bCopy )
  {
   return "";
  }
  ImageAlphaBlending($backImg,true);
  ImageSaveAlpha($backImg,true);
 
  if (!ImagePng($backImg,$resultFile))
   return "";
  return $resultFile;
 }
 
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 function GetFileUpperExt($fullFile)
 {
  if (!File_Exists($fullFile))
   return "";
  $pathInfo = PathInfo($fullFile ); 
  return StrToUpper($pathInfo['extension']); 
 }
 
 function ImageResize($rImage,$iWidth,$iHeight)
 {
  $iCanvas = ImageCreate($iWidth,$iHeight);
  $iWidthX  = ImageSX($rImage);
  $iHeightY = ImageSY($rImage);
  ImageCopyResampled($iCanvas,$rImage,$iHeight,$iWidthX,$iHeightY);
  return $iCanvas;
 }
 
 ImgMerge("06.png","123.png","07.png",370,285,150,15);

?>

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