这篇文章主要介绍了PHP实现多图片上传类实例,该类文件注释详细功能实用且具有一定的扩展性,需要的朋友可以参考下

本文所述为一个实用的PHP多图片文件上传类，其支持gif、jpg、jpeg、pjpeg、png格式的多图片上传功能，类中还可限制图片类型、上传图片的大小、设置上传目录、一些提交判断等功能。此外该类并不局限于图片的上传，也可以上传TXT/RAR等文件类型，只是需要对代码进行一下修改，感兴趣的读者可以自己尝试一下。

php多图片上传类完整功能代码如下：

1. <?php
2. class more_file_upload{
3. const FILE_PATH = '/uploadfile/'; //默认文件上传的目录，请自行修改
4. var file_type;
5. var file_type_array;
6. var file_type_real_array;
7. var file_type_string;
8. var file_name;
9. var file_size;
10. var file_tmp_name;
11. var file_error;
12. var handledate;
13. static totalsize = 0;
14. function __construct(file_name, file_error, file_size, file_tmp_name, file_type){
15. this -> handledate = date('m-d-Y');
16. if (!emptyempty(file_name)){
17. this -> file_name = file_name;
18. this -> file_error = file_error;
19. this -> file_size = file_size;
20. this -> file_tmp_name = file_tmp_name;
21. this -> file_type = file_type;
22. this -> file_type_array = array('/', 'image/gif', 'image/jpg', 'image/jpeg', 'image/pjpeg', 'image/png');
23. this -> file_type_real_array = array(0.1, 'jpg' => 74707370, 'gif' => 7173, 'bmp' => 6677, 'png' => 807871);
24. this -> show_execute_message(this -> file_error, this -> file_name, this -> file_type, this -> file_size);
25. }
26. }
27. function __destruct(){
28. this -> file_name = NULL;
29. this -> file_error = NULL;
30. this -> file_size = NULL;
31. this -> file_tmp_name = NULL;
32. this -> file_type = NULL;
33. self :: totalsize = 0;
34. }
35. function show_execute_message(smfileerror, smfilename, smfiletype, smfilesize){
36. if(smfileerror > 0){
37. switch (smfileerror){
38. case 1: smfilemessage = '<strong>文件超过服务器的约定大小！</strong>';
39. break;
40. case 2: smfilemessage = '<strong>文件超过指定的文件大小！</strong>';
41. break;
42. case 3: smfilemessage = '<strong>文件只上传了部分！</strong>';
43. break;
44. case 4: echo "this->file_name " . '文件上传失败！<br/>';
45. break;
46. }
47. self :: __destruct();
48. }else{
49. smfiletypeflag = array_search(smfiletype, this -> file_type_array);
50. // 进行真实格式验证
51. if(smfiletypeflag != false){
52. file = fopen(this -> file_tmp_name, "rb");
53. bin = fread(file, 10);
54. fclose(file);
55. strInfo = @unpack("c10chars", bin);
56. typeCode = intval(strInfo['chars1'] . strInfo['chars2']);
57. smfiletypeflag = array_search(typeCode, this -> file_type_real_array);
58. if(smfiletypeflag == false){ // 判断是否是png图片
59. typeCode = intval(strInfo['chars2'] . strInfo['chars3'] . strInfo['chars4']);
60. smfiletypeflag = array_search(typeCode, this -> file_type_real_array);
61. if(smfiletypeflag == false){ // 判断是否是jpg图片
62. $typeCode = intval(strInfo['chars7'] . strInfo['chars8'] . strInfo['chars9'] . strInfo['chars10']);
63. smfiletypeflag = array_search(typeCode, this -> file_type_real_array);
64. }
65. }
66. }
67. if($smfiletypeflag == false){
68. $smfilemessage = '<strong>文件类型不对，请核实！</strong>';
69. self :: __destruct();
70. }else{
71. $resflag = $this -> move_file($this -> file_tmp_name, this -> file_name);
72. if (resflag == 1){
73. $smfilemessage = '文件上传成功！';
74. self :: totalsize += intval($smfilesize);
75. self :: __destruct();
76. }else{
77. $smfilemessage = '<strong>文件上传失败！</strong>';
78. self :: __destruct();
79. }
80. }
81. }
82. $smfilesizeformat = $this -> size_BKM(smfilesize);
83. echo '<tr>
84. <td align="left" >' . smfilename . '</td>
85. <td align="center" >' . smfiletype . '</td>
86. <td align="center" >' . smfilesizeformat . '</td>
87. <td align="center" >' . smfilemessage . '</td>
88. </tr>';
89. }
90. function move_file(mvfiletmp, mvfilename){ // 移动文件
91. mvfilenamearr = explode('.', basename(mvfilename));
92. mvfilenamearr[0] = this -> rand_string();
93. mvfilename = implode('.', mvfilenamearr);
94. if (is_uploaded_file(mvfiletmp)){
95. uploadfile = self :: FILE_PATH . "mvfilename";
96. result = move_uploaded_file(mvfiletmp, uploadfile);
97. return result;
98. }
99. }
100. function rand_string(){
101. string = md5(uniqid(rand() . microtime()));
102. return string;
103. }
104. function size_BKM(size){ // B/KB/MB单位转换
105. if(size < 1024)
106. {
107. size_BKM = (string)size . " B";
108. }
109. elseif(size < (1024 * 1024))
110. {
111. size_BKM = number_format((double)(size / 1024), 1) . " KB";
112. }else
113. {
114. size_BKM = number_format((double)(size / (1024 * 1024)), 1) . " MB";
115. }
116. return size_BKM;
117. }
118. }
119. ?>

读者可以将上述代码复制到PHP文件中，并保存文件名为：more_upload_file.class.php，在使用时include该文件即可。