将php中stat()得到的文件权限转成Linux形式

php的stat函数可以返回文件的各种属性，详情见：http://php.net/manual/zh/function.stat.php

其中mode字段表示文件的权限，一个int型的数值。下边的函数是将这个int型数值转换成Linux形式的格式，比如 33206 -> -rw-rw-rw-

 1 /**
 2  * [返回-rwxrwxrwx文件权限表达方式]
 3  * @param  string $filePath [文件路径]
 4  * @return [string]         []
 5  */
 6 function getHumanFileStat($filePath = '')
 7 {
 8     if(!file_exists($filePath) || !is_file($filePath))
 9         return false;
10 
11     clearstatcache();
12     $stat = stat($filePath);
13     $mode = $stat['mode'];
14 
15     //参考libc's fstat()： http://man.he.net/man2/fstat
16     //8进制数值对应的文件类型
17     $typeMap = array(
18         0140000    => 'ssocket',
19         0120000    => 'llink',
20         0100000    => '-file',
21         0060000    => 'bblock',
22         0040000    => 'ddirectory',
23         0020000    => 'cchar',
24         0010000    => 'pfifo',
25     );
26 
27     //各个位的权限对应的8进制数值
28     $bitValueMap = array(
29         'mask'         => 0170000,
30         'ubit'         => 0004000,
31         'gbit'        => 0002000,
32         'stickybit'    => 0001000,
33         'ur'        => 0400,
34         'uw'        => 0200,
35         'ux'        => 0100,
36         'gr'        => 0040,
37         'gw'        => 0020,
38         'gx'        => 0010,
39         'or'        => 0004,
40         'ow'        => 0002,
41         'ox'        => 0001,
42     );
43 
44     $str = '';
45     //filetype，first character
46     $str .= array_key_exists($mode & $bitValueMap['mask'], $typeMap) ? substr($typeMap[$mode & $bitValueMap['mask']], 0, 1) : 'u';
47 
48     //user Permission
49     $str .= $mode & $bitValueMap['ur'] ? 'r' : '-';
50     $str .= $mode & $bitValueMap['uw'] ? 'w' : '-';
51     $str .= $mode & $bitValueMap['ux'] ? ($mode & $bitValueMap['ubit'] ? 's' : 'x') : ($mode & $bitValueMap['ubit'] ? 'S' : '-');
52 
53     //group Permission
54     $str .= $mode & $bitValueMap['gr'] ? 'r' : '-';
55     $str .= $mode & $bitValueMap['gw'] ? 'w' : '-';
56     $str .= $mode & $bitValueMap['gx'] ? ($mode & $bitValueMap['gbit'] ? 's' : 'x') : ($mode & $bitValueMap['gbit'] ? 'S' : '-');
57 
58     //other Permission
59     $str .= $mode & $bitValueMap['or'] ? 'r' : '-';
60     $str .= $mode & $bitValueMap['ow'] ? 'w' : '-';
61     $str .= $mode & $bitValueMap['ox'] ? ($mode & $bitValueMap['stickybit'] ? 't' : 'x') : ($mode & $bitValueMap['stickybit'] ? 'T' : '-');
62 
63     clearstatcache();
64     return $str;
65 }

参考文献：

http://php.net/manual/zh/function.stat.php

http://technosophos.com/2012/02/15/php-mode-strings-stat-and-stream-wrappers.html

http://man.he.net/man2/fstat

posted on 2015-08-29 11:59 什么玩阅读(542) 评论(0) 编辑收藏举报