php简单文件上传类

1. <?php
2. header("Content-Type:text/html; charset=utf-8");
3. if($_POST['submit']){
4. $upfiles = new Upload();
5. $upfiles->upload_file();
6. }
7. class Upload{
8. /*作者：mckee 来自：www.phpddt.com*/
9. public $upload_name; //上传文件名
10. public $upload_tmp_name; //上传临时文件名
11. public $upload_final_name; //上传文件的最终文件名
12. public $upload_target_dir; //文件被上传到的目标目录
13. public $upload_target_path; //文件被上传到的最终路径
14. public $upload_filetype ; //上传文件类型
15. public $allow_uploadedfile_type; //允许的上传文件类型
16. public $upload_file_size; //上传文件的大小
17. public $allow_uploaded_maxsize=10000000; //允许上传文件的最大值
18. //构造函数
19. public function __construct()
20. {
21. $this->upload_name = $_FILES["file"]["name"]; //取得上传文件名
22. $this->upload_filetype = $_FILES["file"]["type"];
23. $this->upload_tmp_name = $_FILES["file"]["tmp_name"];
24. $this->allow_uploadedfile_type = array('jpeg','jpg','png','gif','bmp','doc','zip','rar','txt','wps');
25. $this->upload_file_size = $_FILES["file"]["size"];
26. $this->upload_target_dir="./upload";
27. }
28. //文件上传
29. public function upload_file()
30. {
31. $upload_filetype = $this->getFileExt($this->upload_name);
32. if(in_array($upload_filetype,$this->allow_uploadedfile_type))
33. {
34. if($this->upload_file_size < $this->allow_uploaded_maxsize)
35. {
36. if(!is_dir($this->upload_target_dir))
37. {
38. mkdir($this->upload_target_dir);
39. chmod($this->upload_target_dir,0777);
40. }
41. $this->upload_final_name = date("YmdHis").rand(0,100).'.'.$upload_filetype;
42. $this->upload_target_path = $this->upload_target_dir."/".$this->upload_final_name;
43. if(!move_uploaded_file($this->upload_tmp_name,$this->upload_target_path))
44. echo "<font color=red>文件上传失败！</font>";
45. }
46. else
47. {
48. echo("<font color=red>文件太大,上传失败！</font>");
49. }
50. }
51. else
52. {
53. echo("不支持此文件类型，请重新选择");
54. }
55. }
56. /**
57. *获取文件扩展名
58. *@param String $filename 要获取文件名的文件
59. */
60. public function getFileExt($filename){
61. $info = pathinfo($filename);
62. return $info["extension"];
63. }
64. }
65. ?>
66. <form enctype="multipart/form-data" method="POST" action="">
67. <input type="file" name="file"><input type="submit" name="submit" value="上传">
68. </form>