这款图片上传代码可以把上传的图片增加水印,生成小图片,同时还可以生成文字水印,php图片上传类同时可生成缩略图与加水印实例代码如下:

1. class upimages {
2. var $annexfolder = "upload";//附件存放点，默认为：annex
3. var $smallfolder = "small";//缩略图存放路径，注：必须是放在 $annexfolder下的子目录，默认为：smallimg
4. var $markfolder = "mark";//水印图片存放处
5. var $upfiletype = "jpg gif png";//上传的类型，默认为：jpg gif png rar zip
6. var $upfilemax = 1024;//上传大小限制，单位是"kb"，默认为：1024kb
7. var $fonttype;//字体
8. var $maxwidth = 500; //图片最大宽度
9. var $maxheight = 600; //图片最大高度
10. function upimages($annexfolder,$smallfolder,$includefolder) {
11. $this->annexfolder = $annexfolder;
12. $this->smallfolder = $smallfolder;
13. $this->fonttype = $includefolder."/04b_08__.ttf";
14. }
15. function upload($inputname) {
16. $imagename = time();//设定当前时间为图片名称
17. if(@emptyempty($_files[$inputname]["name"])) die("没有上传图片信息，请确认");
18. $name = explode(".",$_files[$inputname]["name"]);//将上传前的文件以"."分开取得文件类型
19. $imgcount = count($name);//获得截取的数量
20. $imgtype = $name[$imgcount-1];//取得文件的类型
21. if(strpos($this->upfiletype,$imgtype) === false) die(error("上传文件类型仅支持 ".$this->upfiletype." 不支持 ".$imgtype));
22. $photo = $imagename.".".$imgtype;//写入数据库教程的文件名
23. $uploadfile = $this->annexfolder."/".$photo;//上传后的文件名称
24. $upfileok = move_uploaded_file($_files[$inputname]["tmp_name"],$uploadfile);
25. if($upfileok) {
26. $imgsize = $_files[$inputname]["size"];
27. $ksize = round($imgsize/1024);
28. if($ksize > ($this->upfilemax*1024)) {
29. @unlink($uploadfile);
30. die(error("上传文件超过 ".$this->upfilemax."kb"));
31. }
32. } else {
33. die(error("上传图片失败，请确认你的上传文件不超过 $upfilemax kb 或上传时间超时"));
34. }
35. return $photo;
36. }
37. function getinfo($photo) {
38. $photo = $this->annexfolder."/".$photo;
39. $imageinfo = getimagesize($photo);
40. $imginfo["width"] = $imageinfo[0];
41. $imginfo["height"] = $imageinfo[1];
42. $imginfo["type"] = $imageinfo[2];
43. $imginfo["name"] = basename($photo);
44. return $imginfo;
45. }
46. function smallimg($photo,$width=128,$height=128) {
47. $imginfo = $this->getinfo($photo);
48. $photo = $this->annexfolder."/".$photo;//获得图片源
49. $newname = substr($imginfo["name"],0,strrpos($imginfo["name"], "."))."_thumb.jpg";//新图片名称
50. if($imginfo["type"] == 1) {
51. $img = imagecreatefromgif($photo);
52. } elseif($imginfo["type"] == 2) {
53. $img = imagecreatefromjpeg($photo);
54. } elseif($imginfo["type"] == 3) {
55. $img = imagecreatefrompng($photo);
56. } else {
57. $img = "";
58. }
59. if(emptyempty($img)) return false;
60. $width = ($width > $imginfo["width"]) ? $imginfo["width"] : $width;
61. $height = ($height > $imginfo["height"]) ? $imginfo["height"] : $height;
62. $srcw = $imginfo["width"];
63. $srch = $imginfo["height"];
64. if ($srcw * $width > $srch * $height) {
65. $height = round($srch * $width / $srcw);
66. } else {
67. $width = round($srcw * $height / $srch);
68. }
69. if (function_exists("imagecreatetruecolor")) {
70. $newimg = imagecreatetruecolor($width, $height);
71. imagecopyresampled($newimg, $img, 0, 0, 0, 0, $width, $height, $imginfo["width"], $imginfo["height"]);
72. } else {
73. $newimg = imagecreate($width, $height);
74. imagecopyresized($newimg, $img, 0, 0, 0, 0, $width, $height, $imginfo["width"], $imginfo["height"]);
75. }
76. if ($this->tofile) {
77. if (file_exists($this->annexfolder."/".$this->smallfolder."/".$newname)) @unlink($this->annexfolder."/".$this->smallfolder."/".$newname);
78. imagejpeg($newimg,$this->annexfolder."/".$this->smallfolder."/".$newname);
79. return $this->annexfolder."/".$this->smallfolder."/".$newname;
80. } else {
81. imagejpeg($newimg);
82. }
83. imagedestroy($newimg);
84. imagedestroy($img);
85. return $newname;
86. }
87. function watermark($photo,$text) {
88. $imginfo = $this->getinfo($photo);
89. $photo = $this->annexfolder."/".$photo;
90. $newname = substr($imginfo["name"], 0, strrpos($imginfo["name"], ".")) . "_mark.jpg";
91. switch ($imginfo["type"]) {
92. case 1:
93. $img = imagecreatefromgif($photo);
94. break;
95. case 2:
96. $img = imagecreatefromjpeg($photo);
97. break;
98. case 3:
99. $img = imagecreatefrompng($photo);
100. break;
101. default:
102. return false;
103. }
104. if (emptyempty($img)) return false;
105. $width = ($this->maxwidth > $imginfo["width"]) ? $imginfo["width"] : $this->maxwidth;
106. $height = ($this->maxheight > $imginfo["height"]) ? $imginfo["height"] : $this->maxheight;
107. $srcw = $imginfo["width"];
108. $srch = $imginfo["height"];
109. if ($srcw * $width > $srch * $height) {
110. $height = round($srch * $width / $srcw);
111. } else {
112. $width = round($srcw * $height / $srch);
113. }
114. if (function_exists("imagecreatetruecolor")) {
115. $newimg = imagecreatetruecolor($width, $height);
116. imagecopyresampled($newimg, $img, 0, 0, 0, 0, $width, $height, $imginfo["width"], $imginfo["height"]);
117. } else {
118. $newimg = imagecreate($width, $height);
119. imagecopyresized($newimg, $img, 0, 0, 0, 0, $width, $height, $imginfo["width"], $imginfo["height"]);
120. }
121. $white = imagecolorallocate($newimg, 255, 255, 255);
122. $black = imagecolorallocate($newimg, 0, 0, 0);
123. $alpha = imagecolorallocatealpha($newimg, 230, 230, 230, 40);
124. imagefilledrectangle($newimg, 0, $height-26, $width, $height, $alpha);
125. imagefilledrectangle($newimg, 13, $height-20, 15, $height-7, $black);
126. imagettftext($newimg, 4.9, 0, 20, $height-14, $black, $this->fonttype, $text[0]);
127. imagettftext($newimg, 4.9, 0, 20, $height-6, $black, $this->fonttype, $text[1]);
128. if($this->tofile) {
129. if (file_exists($this->annexfolder."/".$this->markfolder."/".$newname)) @unlink($this->annexfolder."/".$this->markfolder."/".$newname);
130. imagejpeg($newimg,$this->annexfolder."/".$this->markfolder."/".$newname);
131. return $this->annexfolder."/".$this->markfolder."/".$newname;
132. } else {
133. imagejpeg($newimg);
134. }//开源代码phpfensi.com
135. imagedestroy($newimg);
136. imagedestroy($img);
137. return $newname;
138. }
139. }