这篇文章主要介绍了php文件上传类,结合完整实例形式分析了php上传文件的类型判断、大小计算机限制等技巧,需要的朋友可以参考下，本文实例讲述了php文件上传类，分享给大家供大家参考，具体如下：

1. /**
2. $file=new class_file($file_array,"flash/");
3. $file->set_allow_type(array("jpg","jpeg","gif"));
4. $file->is_limit_size();
5. if(!$file->allow_file_size()){
6. echo $file->error;
7. exit;
8. }
9. if(!$file->allow_file_type()){
10. echo $file->error;
11. exit();
12. }else if(!$file->uploadfile()){
13. echo $file->error;
14. exit;
15. }
16. **/
17. <?php
18. class class_file{
19. private $file_type;
20. private $file_size;
21. private $save_path;
22. private $file_path;
23. private $allow_type=array();
24. private $allow_size;
25. private $file_name;
26. private $flag=false;
27. private $mime_type;
28. private $is_limit_size=false;
29. public $error;
30. //构造函数
31. function class_file($file_array,$save_path){
32. $this->file_path=$file_array['tmp_name'];
33. $this->file_size=$file_array['size'];
34. $this->file_type=$file_array['type'];
35. $this->save_path=$save_path;
36. }
37. //设置允许的文件类型
38. function set_allow_type($allow_type){
39. $this->allow_type=$allow_type;
40. }
41. //设置允许的文件大小
42. function set_allow_size($allow_size){
43. $this->allow_size=$allow_size;
44. }
45. //文件上传
46. public function uploadfile(){
47. if(!$this->allow_file_type()){
48. $this->file_name();
49. }
50. if(move_uploaded_file($this->file_path,$this->save_path.$this->file_name)){
51. return true;
52. }else{
53. $this->error="文件上传失败";
54. return;
55. }
56. }
57. //判断文件上传的类型
58. function allow_file_type(){
59. $this->file_name();
60. if(in_array($this->mime_type,$this->allow_type)){
61. return true;
62. }else{
63. $this->error="不允许上传的类型";
64. exit();
65. }
66. }
67. //判断文件上传的大小
68. function allow_file_size($size=100){
69. if($this->is_limit_size){
70. $this->set_allow_size($size);
71. if($this->allow_size>=$this->file_size){
72. return true;
73. }else{
74. $this->error="超过文件上传大小限制";
75. }
76. }
77. }
78. //是否限制文件大小
79. function is_limit_size(){
80. $this->is_limit_size=true;
81. }
82. //文件类型和文件名称
83. function file_name(){
84. $this->mime_type=substr($this->file_type,strpos($this->file_type,"/")+1);
85. if($this->mime_type=="pjpeg"){
86. $this->mime_type="jpg";
87. }
88. if($this->mime_type=="x-ms-wma"){
89. $this->mime_type="wma";
90. }
91. if($this->mime_type=="x-ms-wmv"){
92. $this->mime_type="wmv";
93. }
94. $this->file_name=date("YmdHis").".$this->mime_type";
95. }
96. function _get_file_name(){
97. return $this->file_name;
98. }
99. }
100. ?>