php图片水印代码，php上传图片加水印实例代码

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. ?>
29. method="post" name="upform">

    上传文件:

    
    

    允许上传的文件类型为:=implode(', ',$uptypes)?>
30. if ($_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 //检查文件大小
41. {
42. echo "文件太大!";
43. exit;
44. }
45. if(!in_array($file["type"], $uptypes))
46. //检查文件类型
47. {
48. echo "文件类型不符!".$file["type"];
49. exit;
50. }
51. if(!file_exists($destination_folder))
52. {
53. mkdir($destination_folder);
54. }
55. $filename=$file["tmp_name"];
56. $image_size = getimagesize($filename);
57. $pinfo=pathinfo($file["name"]);
58. $ftype=$pinfo['extension'];
59. $destination = $destination_folder.
60. time().".".$ftype;
61. if (file_exists($destination) &&
62. $overwrite != true)
63. {
64. echo "同名文件已经存在了";
65. exit;
66. }
67. if(!move_uploaded_file ($filename,
68. $destination))
69. {
70. echo "移动文件出错";
71. exit;
72. }
73. $pinfo=pathinfo($destination);
74. $fname=$pinfo[basename];
75. echo " 已经成功上传
76. 
    文件名:
77. ".$destination_folder.
78. $fname."

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

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