PHP常用的基本文件和目录操作总结

喜欢ヅ旅行 2022-08-12 16:14 113阅读 0赞

来源：[http://www.ido321.com/835.html][http_www.ido321.com_835.html]

一、基本文件的操作

文件的基本操作有：文件判断、目录判断、文件大小、读写性判断、存在性判断及文件时间等

1: <?php

2:     header("content-type","text/html;charset=utf-8");

3: /*

4: *声明一个函数，传入文件名获取文件属性

5: *@param string $fileName 文件名称

6: */

7: function getFilePro($fileName)

8: {

9:     if(!file_exists($fileName))

10:     {

11:         echo '文件不存在<br/>';

12:         return;

13:     }

14:     /*是否是普通文件*/

15:     if(is_file($fileName))

16:     {

17:         echo $fileName.'是一个文件<br/>';

18:     }

19:     /*是否是目录*/

20:     if(is_dir($fileName))

21:     {

22:         echo $fileName.'是一个目录';

23:     }

24:     /*输出文件的型态*/

25:     echo '文件型态是：'.getFileType($fileName).'<br/>';

26:     /*文件大小,转换单位*/

27:     echo '文件大小是：'.getFileSize(filesize($fileName)).'<br/>';

28:     /*文件是否可读*/

29:     if(is_readable($fileName))

30:     {

31:         echo '文件可读<br/>';

32:     }

33:     /*文件是否可写*/

34:     if(is_writable($fileName))

35:     {

36:         echo '文件可写<br/>';

37:     }

38:     /*文件是否可执行*/

39:     if(is_executable($fileName))

40:     {

41:         echo '文件可执行<br/>';

42:     }

43:

44:     echo '文件创立时间：'.date('Y年m月j日',filectime($fileName)).'<br/>';

45:     echo '文件最后修改时间：'.date('Y年m月j日',filemtime($fileName)).'<br/>';

46:     echo '文件最后打开时间：'.date('Y年m月j日',fileatime($fileName)).'<br/>';

47: }

48:

49: /*

50: *声明一个函数，返回文件类型

51: *@param string $fileName 文件名称

52: */

53: function getFileType($fileName)

54: {

55:     $type = '';

56:     switch(filetype($fileName))

57:     {

58:         case 'file':$type .= '普通文件';break;

59:         case 'dir':$type .= '目录文件';break;

60:         case 'block':$type .= '块设备文件';break;

61:         case 'char':$type .= '字符设备文件';break;

62:         case 'filo':$type .= '管道文件';break;

63:         case 'link':$type .= '符号链接';break;

64:         case 'unknown':$type .= '未知文件';break;

65:         default:

66:     }

67:     return $type;

68: }

69:

70: /*

71: *声明一个函数，返回文件大小

72: *@param int $bytes 文件字节数

73: */

74: function getFileSize($bytes)

75: {

76:     if($bytes >= pow(2,40))

77:     {

78:         $return = round($bytes / pow(1024,4),2);

79:         $suffix = 'TB';

80:     }

81:     else if($bytes >= pow(2,30))

82:     {

83:         $return = round($bytes / pow(1024,3),2);

84:         $suffix = 'GB';

85:     }

86:     else if($bytes >= pow(2,20))

87:     {

88:         $return = round($bytes / pow(1024,2),2);

89:         $suffix = 'MB';

90:     }

91:     else if($bytes >= pow(2,10))

92:     {

93:         $return = round($bytes / pow(1024,1),2);

94:         $suffix = 'KB';

95:     }

96:     else

97:     {

98:         $return = $bytes;

99:         $suffix = 'B';

100:     }

101:     return $return." ".$suffix;

102: }

103:

104: /*调用函数，传入test目录下的test.txt文件*/

105: getFilePro('./test/div.html');

106: ?>

结果:  
![SouthEast][]

二、目录的操作

目录的操作有：遍历目录、删除、复制、大小统计等

1、遍历目录

1: /*

2: *遍历目录

3: *@param string $dirName 目录名

4: */

5: function findDir($dirName)

6: {

7:     $num  = 0;  /*统计子文件个数*/

8:     $dir_handle = opendir($dirName);  /*打开目录*/

9:     /*输出目录文件*/

10:     echo '<table border="0" align="center" width="600" cellspacing="0" cellpadding="0">';

11:     echo '<caption><h2>目录'.$dirName.'下的文件</h2></caption>';

12:     echo '<tr align="left" bgcolor="#cccccc"';

13:     echo '<th>文件名</th><th>文件大小</th><th>文件类型</th><th>修改时间</th></tr>';

14:

15:     while($file = readdir($dir_handle))

16:     {

17:         $dirFile = $dirName.'/'.$file;

18:         $bgcolor = $num++%2==0?'#ffffff':'#cccccc';

19:         echo '<tr bgcolor='.$bgcolor.'>';

20:         echo '<td>'.$file.'</td>';

21:         echo '<td>'.filesize($dirFile).'</td>';

22:         echo '<td>'.filetype($dirFile).'</td>';

23:         echo '<td>'.date('Y/n/t',filemtime($dirFile)).'</td>';

24:         echo '</tr>';

25:     }

26:     echo "</table>";

27:     closedir($dir_handle);  /*关闭目录*/

28:     echo "在<b>".$dirName."</b>目录下共有<b>".$num.'</b>个子文件';

29: }

30: /*传递当前目录下的test目录*/

31: findDir('./test');

结果

![SouthEast 1][]

2、统计目录大小

1: /*

2: *统计目录大小

3: *@param string $dirName 目录名

4: *@return double

5: */

7: function dirSize($dirName)

8: {

9:     $dir_size = 0;

10:     if($dir_handle = @opendir($dirName))

11:     {

12:         while ($fileName = readdir($dir_handle))

13:         {

14:              /*排除两个特殊目录*/

15:             if($fileName != '.' && $fileName != '..')

16:             {

17:                 $subFile = $dirName.'/'.$fileName;

18:                 if(is_file($subFile))

19:                 {

20:                     $dir_size += filesize($subFile);

21:                 }

22:                 if(is_dir($subFile))

23:                 {

24:                     $dir_size += dirSize($subFile);

25:                 }

26:             }

27:         }

28:         closedir($dir_handle);

29:         return $dir_size;

30:     }

31: }

32: /*传递当前目录下的test目录*/

33: $dir_size = dirSize('./test');

34: echo './test目录文件大小是：'.round($dir_size / pow(1024,1),2).'KB';

结果

![SouthEast 2][]

3、删除目录

1: /*

2: *删除目录

3: *@param string $dirName 目录名

4: */

5: function delDir($dirName)

6: {

7:     /*php中的mkdir函数就可以创建目录*/

8:     if(file_exists($dirName))

9:     {

10:         if($dir_handle = @opendir($dirName))

11:         {

12:             while ($fileName = readdir($dir_handle))

13:             {

14:                  /*排除两个特殊目录*/

15:                 if($fileName != '.' && $fileName != '..')

16:                 {

17:                     $subFile = $dirName.'/'.$fileName;

18:                     if(is_file($subFile))

19:                     {

20:                         unlink($subFile);

21:                     }

22:                     if(is_dir($subFile))

23:                     {

24:                         delDir($subFile);

25:                     }

26:                 }

27:             }

28:             closedir($dir_handle);

29:             rmdir($dirName);

30:             return $dirName.'目录已经删除';

31:         }

32:     }

33: }

34: /*传递test目录的副本test1*/

35: echo delDir('./test1');

删除成功的提示信息

![SouthEast 3][]

4、复制目录

1: /*

2: *复制目录

3: *@param string $dirSrc 原目录名

4: *@param string $dirTo 目标目录名

5: */

6: function copyDir($dirSrc,$dirTo)

7: {

8:     if(is_file($dirTo))

9:     {

10:         echo '目标目录不能创建';/*目标不是一个*/

11:         return;

12:     }

13:     if(!file_exists($dirTo))

14:     {

15:         /*目录不存在则创建*/

16:         mkdir($dirTo);

17:     }

18:     if($dir_handle = @opendir($dirSrc))

19:     {

20:         while ($fileName = readdir($dir_handle))

21:         {

22:              /*排除两个特殊目录*/

23:             if($fileName != '.' && $fileName != '..')

24:             {

25:                 $subSrcFile = $dirSrc.'/'.$fileName;

26:                 $subToFile = $dirTo.'/'.$fileName;

27:                 if(is_file($subSrcFile))

28:                 {

29:                     copy($subSrcFile,$subToFile);

30:                 }

31:                 if(is_dir($subSrcFile))

32:                 {

33:                     copyDir($subSrcFile,$subToFile);

34:                 }

35:             }

36:         }

37:         closedir($dir_handle);

38:         return $dirSrc.'目录已经复制到'.$dirTo.'目录';

39:     }

40: }

41: echo copyDir('./test','../testcopy');

[http_www.ido321.com_835.html]: http://www.ido321.com/835.html
[SouthEast]: /images/20220810/b8587de32d7f41f685d3a118065d98da.png
[SouthEast 1]: /images/20220810/4ef954e48e9b4b47b97b0df203932d2a.png
[SouthEast 2]: /images/20220810/5dd2c719078043b684b00e5d51686774.png
[SouthEast 3]: /images/20220810/47f9a2d34aa44c84a52681772bc8d6b6.png