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php上传图片并打上透明水印的代码

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Release： 2016-07-25 09:03:47
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  2. $im = imagecreatefromjpeg($_file["upload"]["tmp_name"]); //你要打水例子的图片
  3. $watermark = imagecreatefrompng("Smiley.png"); //水印图的路径
  4. $im_x = imagesx($im);
  5. $im_y = imagesy($im);
  6. $w_x = imagesx($watermark);
  7. $w_y = imagesy($watermark);
  8. imagecopy($im,$watermark ,$im_x-$w_x,$im_y-$w_y,0,0,$w_x,$w_y);
  9. imagejpeg($im); //可加上路径以保存有水印的图
  10. //可以利用type判断下图片类型
  11. //switch($_file["upload"]["type"])
  12. //case:1
  13. //然后用不同的函数
  14. //imagejpeg()对应jpeg
  15. //imagegif()对应gif
  16. //imagepng()对应png
  17. imagedestroy($im);
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php上传图片并打上透明水印的代码
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