在PHP的使用中，它有着非常方便的操作设计，这次文章就给大家介绍下怎么使用PHP实现常用文件上传，相信这也是大多数人会遇到的问题，下面我们具体看看上传方法。

1. <?php
2. /**
3. * 上传文件类
4. * @param _path : 服务器文件存放路径
5. * @param _allowType : 允许上传的文件类型和所对应的MIME
6. * @param _file : 上传的文件信息
7. */
8. class Upload{
9. private $_path;
10. private $_allowType;
11. private $_file;
12. /**
13. * 构造函数
14. * @param string : 服务器上存放上传文件的路径
15. */
16. function __construct( $path = '' )
17. {
18. $this->_path = $path;
19. $this->_allowType = array(
20. // images
21. 'bmp' => 'image/x-ms-bmp',
22. 'jpg' => 'image/jpeg',
23. 'jpeg' => 'image/jpeg',
24. 'gif' => 'image/gif',
25. 'png' => 'image/png',
26. 'tif' => 'image/tiff',
27. 'tiff' => 'image/tiff',
28. 'tga' => 'image/x-targa',
29. 'psd' => 'image/vnd.adobe.photoshop',
30. //文本
31. 'txt' => 'text/plain',
32. 'php' => 'text/x-php',
33. 'html' => 'text/html',
34. 'htm' => 'text/html',
35. 'js' => 'text/javascript',
36. '<a href="http://www.phpfensi.com/cssdiv/css.html" class="anchor" target="_blank">css</a>' => 'text/css',
37. 'rtf' => 'text/rtf',
38. 'rtfd' => 'text/rtfd',
39. 'py' => 'text/x-python',
40. 'java' => 'text/x-java-source',
41. 'rb' => 'text/x-ruby',
42. 'sh' => 'text/x-shellscript',
43. 'pl' => 'text/x-perl',
44. 'sql' => 'text/x-sql',
45. //应用
46. 'exe' => 'application/octet-stream',
47. 'doc' => 'application/vnd.ms-word',
48. 'docx' => 'application/vnd.ms-word',
49. 'xls' => 'application/vnd.ms-excel',
50. 'ppt' => 'application/vnd.ms-powerpoint',
51. 'pps' => 'application/vnd.ms-powerpoint',
52. 'pdf' => 'application/pdf',
53. 'xml' => 'application/xml',
54. //音频
55. 'mp3' => 'audio/mpeg',
56. 'mid' => 'audio/midi',
57. 'ogg' => 'audio/ogg',
58. 'mp4a' => 'audio/mp4',
59. 'wav' => 'audio/wav',
60. 'wma' =&ggt; 'audio/x-ms-wma',
61. //视频
62. 'avi' => 'video/x-msvideo',
63. 'dv' => 'video/x-dv',
64. 'mp4' => 'video/mp4',
65. 'mpeg' => 'video/mpeg',
66. 'mpg' => 'video/mpeg',
67. 'mov' => 'video/quicktime',
68. 'wm' => 'video/x-ms-wmv',
69. 'flv' => 'video/x-flv',
70. 'mkv' => 'video/x-matroska'
71. );
72. }
73. /**
74. * 上传函数
75. * @param string : 表单元素的name 值
76. * @return [type]
77. */
78. public function upload( $txtName = '' )
79. {
80. $this->_file = $_FILES[$txtName];
81. if( $this->_file['error'] == 0){
82. $fileType = end( explode('.', $this->_file['name'] ));
83. $allowType = array();
84. foreach( $this->_allowType as $item=>$value ){
85. $allowType[] = $item;
86. }
87. if( !in_array($fileType, $allowType)){
88. die('上传的文件格式不正确！');
89. }else{
90. if(move_uploaded_file($this->file['tmp_name'], ($this->path).$this->file['name']))
91. {
92. echo "<script>alert('上传成功!')</script>";
93. }
94. else
95. {
96. echo "<script>alert('上传失败!');</script>";
97. }
98. }
99. }else{
100. //没有正确上传
101. switch ($this->file['error']){
102. case 1:
103. die('文件大小超过系统限制。');
104. break;
105. case 2:
106. die('文件大小超过预定义限制。');
107. break;
108. case 3:
109. die('文件为完全上传。');
110. break;
111. case 4:
112. die('未上传任何文件。');
113. break;
114. default:
115. die('上传出错');
116. break;
117. }
118. }
119. }
120. //end upload
121. }