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一个加强版的php水印代码

时间:2021-07-01 10:21:17 帮助过:24人阅读

  1. /*

  2. * 功能:PHP图片水印 (水印支持图片或文字)
  3. * 参数:
  4. * $groundImage 背景图片,即需要加水印的图片,暂只支持GIF,JPG,PNG格式;
  5. * $waterPos 水印位置,有10种状态,0为随机位置;
  6. * 1为顶端居左,2为顶端居中,3为顶端居右;
  7. * 4为中部居左,5为中部居中,6为中部居右;
  8. * 7为底端居左,8为底端居中,9为底端居右;
  9. * $waterImage 图片水印,即作为水印的图片,暂只支持GIF,JPG,PNG格式;
  10. * $waterText 文字水印,即把文字作为为水印,支持ASCII码,不支持中文;
  11. * $textFont 文字大小,值为1、2、3、4或5,默认为5;
  12. * $textColor 文字颜色,值为十六进制颜色值,默认为#FF0000(红色);
  13. *
  14. * 注意:Support GD 2.0,Support FreeType、GIF Read、GIF Create、JPG 、PNG
  15. * $waterImage 和 $waterText 最好不要同时使用,选其中之一即可,优先使用 $waterImage。
  16. * 当$waterImage有效时,参数$waterString、$stringFont、$stringColor均不生效。
  17. * 加水印后的图片的文件名和 $groundImage 一样。
  18. * 作者:longware
  19. */
  20. function imageWaterMark($groundImage,$waterPos=9,$waterImage=”",$waterText=”",$textFont=5,$textColor=”#FF0000″)
  21. {
  22. $isWaterImage = FALSE;
  23. $formatMsg = “暂不支持该文件格式,请用图片处理软件将图片转换为GIF、JPG、PNG格式。”;
  24. //读取水印文件
  25. if(!empty($waterImage) && file_exists($waterImage))
  26. {
  27. $isWaterImage = TRUE;
  28. $water_info = getimagesize($waterImage);
  29. $water_w = $water_info[0];//取得水印图片的宽
  30. $water_h = $water_info[1];//取得水印图片的高
  31. switch($water_info[2])//取得水印图片的格式
  32. {
  33. case 1:$water_im = imagecreatefromgif($waterImage);break;
  34. case 2:$water_im = imagecreatefromjpeg($waterImage);break;
  35. case 3:$water_im = imagecreatefrompng($waterImage);break;
  36. default:die($formatMsg);
  37. }
  38. }
  39. //读取背景图片
  40. if(!empty($groundImage) && file_exists($groundImage))
  41. {
  42. $ground_info = getimagesize($groundImage);
  43. $ground_w = $ground_info[0];//取得背景图片的宽
  44. $ground_h = $ground_info[1];//取得背景图片的高
  45. switch($ground_info[2])//取得背景图片的格式
  46. {
  47. case 1:$ground_im = imagecreatefromgif($groundImage);break;
  48. case 2:$ground_im = imagecreatefromjpeg($groundImage);break;
  49. case 3:$ground_im = imagecreatefrompng($groundImage);break;
  50. default:die($formatMsg);
  51. }
  52. }
  53. else
  54. {
  55. die(“需要加水印的图片不存在!”);
  56. }
  57. //水印位置
  58. if($isWaterImage)//图片水印
  59. {
  60. $w = $water_w;
  61. $h = $water_h;
  62. $label = “图片的”;
  63. }
  64. else//文字水印
  65. {
  66. $temp = imagettfbbox(ceil($textFont*2.5),0,”simfang.ttf”,$waterText);//取得使用 TrueType 字体的文本的范围
  67. $w = $temp[2] – $temp[6];
  68. $h = $temp[3] – $temp[7];
  69. unset($temp);
  70. $label = “文字区域”;
  71. }
  72. if( ($ground_w<$w) || ($ground_h<$h) )
  73. {
  74. echo “需要加水印的图片的长度或宽度比水印”.$label.”还小,无法生成水印!”;
  75. return;
  76. }
  77. switch($waterPos)
  78. {
  79. case 0://随机
  80. $posX = rand(0,($ground_w – $w));
  81. $posY = rand(0,($ground_h – $h));
  82. break;
  83. case 1://1为顶端居左
  84. $posX = 0;
  85. $posY = 0;
  86. break;
  87. case 2://2为顶端居中
  88. $posX = ($ground_w – $w) / 2;
  89. $posY = 0;
  90. break;
  91. case 3://3为顶端居右
  92. $posX = $ground_w – $w;
  93. $posY = 0;
  94. break;
  95. case 4://4为中部居左
  96. $posX = 0;
  97. $posY = ($ground_h – $h) / 2;
  98. break;
  99. case 5://5为中部居中
  100. $posX = ($ground_w – $w) / 2;
  101. $posY = ($ground_h – $h) / 2;
  102. break;
  103. case 6://6为中部居右
  104. $posX = $ground_w – $w;
  105. $posY = ($ground_h – $h) / 2;
  106. break;
  107. case 7://7为底端居左
  108. $posX = 0;
  109. $posY = $ground_h – $h;
  110. break;
  111. case 8://8为底端居中
  112. $posX = ($ground_w – $w) / 2;
  113. $posY = $ground_h – $h;
  114. break;
  115. case 9://9为底端居右
  116. $posX = $ground_w – $w;
  117. $posY = $ground_h – $h;
  118. break;
  119. default://随机
  120. $posX = rand(0,($ground_w – $w));
  121. $posY = rand(0,($ground_h – $h));
  122. break;
  123. }
  124. //设定图像的混色模式
  125. imagealphablending($ground_im, true);
  126. if($isWaterImage)//图片水印
  127. {
  128. imagecopy($ground_im, $water_im, $posX, $posY, 0, 0, $water_w,$water_h);//拷贝水印到目标文件
  129. }
  130. else//文字水印
  131. {
  132. if( !empty($textColor) && (strlen($textColor)==7) )
  133. {
  134. $R = hexdec(substr($textColor,1,2));
  135. $G = hexdec(substr($textColor,3,2));
  136. $B = hexdec(substr($textColor,5));
  137. }
  138. else
  139. {
  140. die(“水印文字颜色格式不正确!”);
  141. }
  142. //$waterText=iconv(‘utf-8′,’gbk’,$waterText);
  143. imagestring ( $ground_im, $textFont, $posX, $posY, $waterText, imagecolorallocate($ground_im, $R, $G, $B));
  144. }
  145. //生成水印后的图片
  146. @unlink($groundImage);
  147. switch($ground_info[2])//取得背景图片的格式
  148. {
  149. case 1:imagegif($ground_im,$groundImage);break;
  150. case 2:imagejpeg($ground_im,$groundImage);break;
  151. case 3:imagepng($ground_im,$groundImage);break;
  152. default:die($errorMsg);
  153. }
  154. //释放内存
  155. if(isset($water_info)) unset($water_info);
  156. if(isset($water_im)) imagedestroy($water_im);
  157. unset($ground_info);
  158. imagedestroy($ground_im);
  159. }

  160. //------------------

  161. if(isset($_FILES) && !empty($_FILES['userfile']) && $_FILES['userfile']['size']>0)
  162. {
  163. $uploadfile = “./”.time().”_”.$_FILES['userfile']['name'];
  164. if (copy($_FILES['userfile']['tmp_name'], $uploadfile))
  165. {
  166. echo “OK
  167. “;
  168. //文字水印
  169. imageWaterMark($uploadfile,9,”Noname.gif”,”www.nj-kingsway.com “,5,”#FF0000″);
  170. //图片水印
  171. //$waterImage=”./Hanweb_shuiyin.gif”;//水印图片路径
  172. //imageWaterMark($uploadfile,0,$waterImage);
  173. echo ““;
  174. }
  175. else
  176. {
  177. echo “Fail
  178. “;
  179. }
  180. }
  181. ?>

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