php圖片自動添加浮水印代碼,php圖片浮水印函數代碼

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  1. /*
  2. * 功能:php圖片浮水印 (浮水印支援圖片或文字)
  3. * 參數:
  4. *$groundimage 背景圖片,即需要加浮水印的圖片,暫只支援gif,jpg,png格式;
  5. *$waterpos 浮水印位置,有10種狀態,0為隨機位置;
  6. *1為頂端居左,2為頂端置中,3為頂端居右;
  7. *4為中部居左,5為中部置中,6為中部居右;
  8. *7為底端居左,8為底端置中,9為底端居右;
  9. *$waterimage 圖片浮水印,即作為浮水印的圖片,暫只支援gif,jpg,png格式;
  10. *$watertext 文字浮水印,即把文字作為為浮水印,支援ascii碼,不支援中文;
  11. *$textfont 文字大小,值為1、2、3、4或5,預設為5;
  12. *$textcolor 文字顏色,值為十六進位顏色值,預設為#ff0000(紅色);
  13. *
  14. * 注意:support gd 2.0,support freetype、gif read、gif create、jpg 、png
  15. *$waterimage 和 $watertext 最好不要同時使用,選其中之一即可,優先使用 $waterimage。
  16. *當$waterimage有效時,參數$waterstring、$stringfont、$stringcolor均不生效。
  17. *加浮水印後的圖片的檔案名稱和 $groundimage 一樣。
  18. * 作者:longware @ 2004-11-3 14:15:13
  19. */
  20. function imagewatermark($groundimage,$waterpos=0,$waterimage="",$watertext="",$textfont=5,$textcolor="#ff0000")
  21. {
  22. $iswaterimage = false;
  23. $formatmsg = "暫不支援該檔案格式,請用圖片處理軟體將圖片轉換為gif、jpg、png格式。";
  24. //讀取浮水印檔案
  25. if(!empty($waterimage) && file_exists($waterimage))
  26. {
  27. $iswaterimage = true;
  28. $water_info = getimagesize($waterimage);
  29. $water_w = $water_info[0];//取得浮水印圖片的寬
  30. $water_h = $water_info[1];//取得浮水印圖片的高
  31. switch($water_info[2])//取得浮水印圖片的格式
  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($formatmsg);
  37. }
  38. }
  39. //讀取背景圖片
  40. if(!empty($groundimage) && file_exists($groundimage))
  41. {
  42. $ground_info = getimagesize($groundimage);
  43. $ground_w = $ground_info[0];//取得背景圖片的寬
  44. $ground_h = $ground_info[1];//取得背景圖片的高
  45. switch($ground_info[2])//取得背景圖片的格式
  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($formatmsg);
  51. }
  52. }
  53. else
  54. {
  55. die("需要加浮水印的圖片不存在!");
  56. }
  57. //浮水印位置
  58. if($iswaterimage)//圖片浮水印
  59. {
  60. $w = $water_w;
  61. $h = $water_h;
  62. $label = "圖片的";
  63. }
  64. else//文字浮水印
  65. {
  66. $temp = imagettfbbox(ceil($textfont*2.5),0,"./cour.ttf",$watertext);//取得使用 truetype 字型的文本的範圍
  67. $w = $temp[2] - $temp[6];
  68. $h = $temp[3] - $temp[7];
  69. unset($temp);
  70. $label = "文字地區";
  71. }
  72. if( ($ground_w<$w) || ($ground_h<$h) )
  73. {
  74. echo "需要加浮水印的圖片的長度或寬度比浮水印".$label."還小,無法產生浮水印!";
  75. return;
  76. }
  77. switch($waterpos)
  78. {
  79. case 0://隨機
  80. $posx = rand(0,($ground_w - $w));
  81. $posy = rand(0,($ground_h - $h));
  82. break;
  83. case 1://1為頂端居左
  84. $posx = 0;
  85. $posy = 0;
  86. break;
  87. case 2://2為頂端置中
  88. $posx = ($ground_w - $w) / 2;
  89. $posy = 0;
  90. break;
  91. case 3://3為頂端居右
  92. $posx = $ground_w - $w;
  93. $posy = 0;
  94. break;
  95. case 4://4為中部居左
  96. $posx = 0;
  97. $posy = ($ground_h - $h) / 2;
  98. break;
  99. case 5://5為中部置中
  100. $posx = ($ground_w - $w) / 2;
  101. $posy = ($ground_h - $h) / 2;
  102. break;
  103. case 6://6為中部居右
  104. $posx = $ground_w - $w;
  105. $posy = ($ground_h - $h) / 2;
  106. break;
  107. case 7://7為底端居左
  108. $posx = 0;
  109. $posy = $ground_h - $h;
  110. break;
  111. case 8://8為底端置中
  112. $posx = ($ground_w - $w) / 2;
  113. $posy = $ground_h - $h;
  114. break;
  115. case 9://9為底端居右
  116. $posx = $ground_w - $w;
  117. $posy = $ground_h - $h;
  118. break;
  119. default://隨機
  120. $posx = rand(0,($ground_w - $w));
  121. $posy = rand(0,($ground_h - $h));
  122. break;
  123. }
  124. //設定映像的混色模式
  125. imagealphablending($ground_im, true);
  126. if($iswaterimage)//圖片浮水印
  127. {
  128. imagecopy($ground_im, $water_im, $posx, $posy, 0, 0, $water_w,$water_h);//拷貝浮水印到目標檔案
  129. }
  130. else//文字浮水印
  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("浮水印文字顏色格式不正確!");
  141. }
  142. imagestring ( $ground_im, $textfont, $posx, $posy, $watertext, imagecolorallocate($ground_im, $r, $g, $b));
  143. }
  144. //產生浮水印後的圖片
  145. @unlink($groundimage);
  146. switch($ground_info[2])//取得背景圖片的格式
  147. {
  148. case 1:imagegif($ground_im,$groundimage);break;
  149. case 2:imagejpeg($ground_im,$groundimage);break;
  150. case 3:imagepng($ground_im,$groundimage);break;
  151. default:die($errormsg);
  152. }
  153. //釋放記憶體
  154. if(isset($water_info)) unset($water_info);
  155. if(isset($water_im)) imagedestroy($water_im);
  156. unset($ground_info);
  157. imagedestroy($ground_im);
  158. }
  159. //--------
  160. if(isset($_files) && !empty($_files['userfile']) && $_files['userfile']['size']>0)
  161. {
  162. $uploadfile = "./".time()."_".$_files['userfile']['name'];
  163. if (copy($_files['userfile']['tmp_name'], $uploadfile))
  164. {
  165. echo "ok
    ";
  166. //文字浮水印
  167. imagewatermark($uploadfile,0,"","http://blog.csdn.net/longware/",5,"#ff0000");
  168. //圖片浮水印
  169. //$waterimage="./hanweb_shuiyin.gif";//浮水印圖片路徑
  170. //imagewatermark($uploadfile,0,$waterimage);
  171. echo "";
  172. }
  173. else
  174. {
  175. echo "fail
    ";
  176. }
  177. }
  178. ?>
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