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php图片水印代码，php上传图片加水印实例代码

时间：2021-07-01 10:21:17 帮助过：19人阅读

  2. //上传文件类型列表
  3. $uptypes=array(
  4. 'image/jpg',
  5. 'image/jpeg',
  6. 'image/png',
  7. 'image/pjpeg',
  8. 'image/gif',
  9. 'image/bmp',
  10. 'image/x-png'
  11. );
  12. $max_file_size=2000000; //上传文件大小限制, 单位BYTE
  13. $destination_folder="uploadimg/"; //上传文件路径
  14. $watermark=1; //是否附加水印(1为加水印,其他为不加水印);
  15. $watertype=1; //水印类型(1为文字,2为图片)
  16. $waterposition=1; //水印位置(1为左下角,2为右下角
  17. ,3为左上角,4为右上角,5为居中);
  18. $waterstring="http://bbs.it-home.org/"; //水印字符串
  19. $waterimg="xplore.gif"; //水印图片
  20. $imgpreview=1; //是否生成预览图(1为生成,其他为不生成);
  21. $imgpreviewsize=1/2; //缩略图比例
  22. ?>
  25. ZwelL图片上传程序
  30. if ($_SERVER['REQUEST_METHOD'] == 'POST')
  31. {
  32. if (!is_uploaded_file($_FILES["upfile"]
  33. [tmp_name]))
  34. //是否存在文件
  35. {
  36. echo "图片不存在!";
  37. exit;
  38. }
  39. $file = $_FILES["upfile"];
  40. if($max_file_size <$file["size"])
  41. //检查文件大小
  42. {
  43. echo "文件太大!";
  44. exit;
  45. }
  46. if(!in_array($file["type"], $uptypes))
  47. //检查文件类型
  48. {
  49. echo "文件类型不符!".$file["type"];
  50. exit;
  51. }
  52. if(!file_exists($destination_folder))
  53. {
  54. mkdir($destination_folder);
  55. }
  56. $filename=$file["tmp_name"];
  57. $image_size = getimagesize($filename);
  58. $pinfo=pathinfo($file["name"]);
  59. $ftype=$pinfo['extension'];
  60. $destination = $destination_folder.
  61. time().".".$ftype;
  62. if (file_exists($destination) &&
  63. $overwrite != true)
  64. {
  65. echo "同名文件已经存在了";
  66. exit;
  67. }
  68. if(!move_uploaded_file ($filename,
  69. $destination))
  70. {
  71. echo "移动文件出错";
  72. exit;
  73. }
  74. $pinfo=pathinfo($destination);
  75. $fname=$pinfo[basename];
  76. echo " 已经成功上传

  77. 文件名:
  78. ".$destination_folder.
  79. $fname."
    ";
  80. echo " 宽度:".$image_size[0];
  81. echo " 长度:".$image_size[1];
  82. echo "
    大小:".$file["size"]." bytes";
  83. if($watermark==1)
  84. {
  85. $iinfo=getimagesize($destination,$iinfo);
  86. $nimage=imagecreatetruecolor($image_size[0]
  87. ,$image_size[1]);
  88. $white=imagecolorallocate($nimage,255,255,255);
  89. $black=imagecolorallocate($nimage,0,0,0);
  90. $red=imagecolorallocate($nimage,255,0,0);
  91. imagefill($nimage,0,0,$white);
  92. switch ($iinfo[2])
  93. {
  94. case 1:
  95. $simage =imagecreatefromgif($destination);
  96. break;
  97. case 2:
  98. $simage =imagecreatefromjpeg($destination);
  99. break;
  100. case 3:
  101. $simage =imagecreatefrompng($destination);
  102. break;
  103. case 6:
  104. $simage =imagecreatefromwbmp($destination);
  105. break;
  106. default:
  107. die("不支持的文件类型");
  108. exit;
  109. }
  110. imagecopy($nimage,$simage,0,0,0,0,
  111. $image_size[0],$image_size[1]);
  112. imagefilledrectangle($nimage,1,
  113. $image_size[1]-15,80,$image_size[1],$white);
  114. switch($watertype)
  115. {
  116. case 1: //加水印字符串
  117. imagestring($nimage,2,3,$image_size[1]-15,
  118. $waterstring,$black);
  119. break;
  120. case 2: //加水印图片
  121. $simage1 =imagecreatefromgif("xplore.gif");
  122. imagecopy($nimage,$simage1,0,0,0,0,85,15);
  123. imagedestroy($simage1);
  124. break;
  125. }
  126. switch ($iinfo[2])
  127. {
  128. case 1:
  129. //imagegif($nimage, $destination);
  130. imagejpeg($nimage, $destination);
  131. break;
  132. case 2:
  133. imagejpeg($nimage, $destination);
  134. break;
  135. case 3:
  136. imagepng($nimage, $destination);
  137. break;
  138. case 6:
  139. imagewbmp($nimage, $destination);
  140. //imagejpeg($nimage, $destination);
  141. break;
  142. }
  143. //覆盖原上传文件
  144. imagedestroy($nimage);
  145. imagedestroy($simage);
  146. }
  147. if($imgpreview==1)
  148. {
  149. echo "
    图片预览:
    ";
  150. echo "height=".($image_size[1]*$imgpreviewsize);"
  151. echo " alt=\"图片预览:\r文件名:".
  152. $destination."\r上传时间:\" />";
  153. }
  154. }
  155. ?>

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