php 上传图片的代码

3. /*

4. * 参数说明
5. * $max_file_size : 上传文件大小限制, 单位BYTE
6. * $destination_folder : 上传文件路径
7. * $watermark : 是否附加水印(1为加水印,其他为不加水印);
8. * http://bbs.it-home.org
9. * 使用说明:
10. * 1. 将PHP.INI文件里面的"extension=php_gd2.dll"一行前面的;号去掉,因为我们要用到GD库;
11. * 2. 将extension_dir =改为你的php_gd2.dll所在目录;
12. */
13. // 上传文件类型列表
14. $uptypes = array (
15. 'image/jpg',
16. 'image/png',
17. 'image/jpeg',
18. 'image/pjpeg',
19. 'image/gif',
20. 'image/bmp',
21. 'image/x-png'
22. );
23. $max_file_size = 20000000; //上传文件大小限制，单位BYTE
24. $destination_folder = 'uploadimg/'; //上传文件路径
25. $watermark = 1; //是否附加水印(1为加水印,其他为不加水印);
26. $watertype = 1; //水印类型(1为文字,2为图片)
27. $waterposition = 1; //水印位置(1为左下角,2为右下角,3为左上角,4为右上角,5为居中);
28. $waterstring = "http://bbs.it-home.org/"; //水印字符串
29. $waterimg = "xplore.gif"; //水印图片
30. $imgpreview = 1; //是否生成预览图(1为生成,其他为不生成);
31. $imgpreviewsize = 1 / 2; //缩略图比例
32. ?>
38. 上传文件：

40. if ($_SERVER['REQUEST_METHOD'] == 'POST') {

41. //判断是否有上传文件

42. if (is_uploaded_file($_FILES['upfile']['tmp_name'])) {

43. $upfile = $_FILES['upfile'];
44. print_r($_FILES['upfile']);
45. $name = $upfilep['name']; //文件名
46. $type = $upfile['type']; //文件类型
47. $size = $upfile['size']; //文件大小
48. $tmp_name = $upfile['tmp_name']; //临时文件
49. $error = $upfile['error']; //出错原因

50. if ($max_file_size echo '上传文件太大';

51. exit ();
52. }

53. if (!in_arrar($type, $uptypes)) { //判断文件的类型

54. echo '上传文件类型不符' . $type;
55. exit ();
56. }

57. if (!file_exists($destination_folder)) {

58. mkdir($destination_folder);
59. }

60. if (file_exists("upload/" . $_FILES["file"]["name"])) {

61. echo $_FILES["file"]["name"] . " already exists. ";
62. } else {
63. move_uploaded_file($_FILES["file"]["tmp_name"], "upload/" . $_FILES["file"]["name"]);
64. echo "Stored in: " . "upload/" . $_FILES["file"]["name"];
65. }

66. $pinfo = pathinfo($name);

67. $ftype = $pinfo['extension'];
68. $destination = $destination_folder . time() . "." . $ftype;
69. if (file_exists($destination) && $overwrite != true) {
70. echo "同名的文件已经存在了";
71. exit ();
72. }

73. if (!move_uploaded_file($tmp_name, $destination)) {

74. echo "移动文件出错";
75. exit ();
76. }

77. $pinfo = pathinfo($destination);

78. $fname = $pinfo[basename];
79. echo " 已经成功上传
    文件名: " . $destination_folder . $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. $iinfo = getimagesize($destination, $iinfo);
85. $nimage = imagecreatetruecolor($image_size[0], $image_size[1]);
86. $white = imagecolorallocate($nimage, 255, 255, 255);
87. $black = imagecolorallocate($nimage, 0, 0, 0);
88. $red = imagecolorallocate($nimage, 255, 0, 0);
89. imagefill($nimage, 0, 0, $white);
90. switch ($iinfo[2]) {
91. case 1 :
92. $simage = imagecreatefromgif($destination);
93. break;
94. case 2 :
95. $simage = imagecreatefromjpeg($destination);
96. break;
97. case 3 :
98. $simage = imagecreatefrompng($destination);
99. break;
100. case 6 :
101. $simage = imagecreatefromwbmp($destination);
102. break;
103. default :
104. die("不支持的文件类型");
105. exit;
106. }

107. imagecopy($nimage, $simage, 0, 0, 0, 0, $image_size[0], $image_size[1]);

108. imagefilledrectangle($nimage, 1, $image_size[1] - 15, 80, $image_size[1], $white);

109. switch ($watertype) {

110. case 1 : //加水印字符串

111. imagestring($nimage, 2, 3, $image_size[1] - 15, $waterstring, $black);

112. break;
113. case 2 : //加水印图片

114. $simage1 = imagecreatefromgif("xplore.gif");

115. imagecopy($nimage, $simage1, 0, 0, 0, 0, 85, 15);
116. imagedestroy($simage1);
117. break;
118. }

119. switch ($iinfo[2]) {

120. case 1 :
121. //imagegif($nimage, $destination);

122. imagejpeg($nimage, $destination);

123. break;
124. case 2 :
125. imagejpeg($nimage, $destination);
126. break;
127. case 3 :
128. imagepng($nimage, $destination);
129. break;
130. case 6 :
131. imagewbmp($nimage, $destination);
132. //imagejpeg($nimage, $destination);
133. break;
134. }

135. //覆盖原上传文件

136. imagedestroy($nimage);
137. imagedestroy($simage);
138. }

139. if ($imgpreview == 1) {

140. echo "
     图片预览:
     ";
141. echo "";
142. }
143. }
144. }
145. ?>