这款文件上传实用代码,可以方便的上传你指定的文件或图片,同时也可以快速的限制上传图片文件类或大小,实例代码如下:

1. /*
2. * created on 2010-6-21
3. *
4. * the class for image to upload
5. *
6. * made by s71ence
7. *
8. * @$user_id
9. * @$max_file_size
10. * @$max_image_side
11. * @$destination_folder
12. *
13. * return:
14. * @$_cookie['img_path']
15. * @$img_unfind
16. * @$img_type
17. * @$mkdir_warry
18. * @$img_side_too_big
19. * @$img_exist
20. * @$img_move
21. * @$img_upload_sucess
22. */
23. 代码如下 复制代码
24. header('content-type:text/html;charset=utf-8');
25. class image_upload extends fn_function
26. {
27. private $user_id;
28. private $max_file_size; //allow the image's size
29. private $max_image_side; //allow the image's side
30. private $destination_folder; //image's storage path
31. private $img_preview;
32. private $img_preview_size;
33. private $cookie_set; //the cookie's name
34. function __construct($user_id,$max_file_size,$max_image_side,$destination_folder,$img_preview,$img_preview_size,$cookie_set)
35. {
36. $this->user_id=$user_id;
37. $this->max_file_size=$max_file_size;
38. $this->max_image_side=$max_image_side;
39. $this->destination_folder=$destination_folder;
40. $this->img_preview=$img_preview;
41. $this->img_preview_size=$img_preview_size;
42. $this->cookie_set=$cookie_set;
43. $this->get_date();
44. $this->get_image_type();
45. }
46. private function get_date()
47. {
48. $this->date=fn_function::get_server_date();
49. return $this->date;
50. }
51. function get_image_type()
52. {
53. $this->up_img_types=array(
54. 'image/jpg',
55. 'image/jpeg',
56. 'image/png',
57. 'image/pjpeg',
58. 'image/gif',
59. 'image/bmp',
60. 'image/x-png'
61. );
62. return $this->up_img_types;
63. }
64. function upload_image()
65. {
66. if ($_server['request_method'] == 'post')
67. {
68. //check the iamge is exist
69. if (!is_uploaded_file($_files["upfile"]["tmp_name"]))
70. {
71. return $img_unfind=fn_function::alert_msg('图片不存在!');
72. exit;
73. }
74. $file = $_files["upfile"];
75. //check the iamge's size
76. if($this->max_file_size < $file["size"])
77. {
78. return $img_side_too_big=fn_function::alert_msg('图片大小超过系统允许最大值!');
79. exit;
80. }
81. //check the iamge's type
82. if(!in_array($file["type"], $this->up_img_types))
83. {
84. return $img_type=fn_function::alert_msg('图片类型不符!');
85. exit;
86. }
87. if(!file_exists($this->destination_folder))
88. {
89. if(!fn_function::mkdirs($this->destination_folder))
90. {
91. return $mkdir_warry=fn_function::alert_msg('目录创建失败!');
92. exit;
93. }
94. }
95. $file_name=$file["tmp_name"];
96. $image_size = getimagesize($file_name);
97. $pinfo=pathinfo($file["name"]);
98. $file_type=$pinfo['extension'];
99. $destination = $this->destination_folder.time().".".$file_type;
100. setcookie($this->cookie_set, $destination);
101. if($image_size[0]>$this->max_image_side || $image_size[1]>$this->max_image_side)
102. {
103. return $img_side_too_big=fn_function::alert_msg('图片分辨率超过系统允许最大值!');
104. exit;
105. }
106. $overwrite="";
107. if (file_exists($destination) && $overwrite != true)
108. {
109. return $img_exist=fn_function::alert_msg('同名文件已经存在了!');
110. exit;
111. }
112. if(!move_uploaded_file ($file_name, $destination))
113. {
114. return $img_move=fn_function::alert_msg('移动文件出错!');
115. exit;
116. }
117. $img_upload_sucess="<font color=red ;
118. if($this->img_preview==1)
119. {
120. $img_src="<img src="".$destination."" width=".($image_size[0]*$this->img_preview_size)." height=".($image_size[1]*$this->img_preview_size);//开源代码phpfensi.com
121. $img_upload_sucess.=$img_src;
122. }
123. return $img_upload_sucess;
124. }
125. }
126. function __destruct()
127. {
128. //clear
129. }
130. }