php常见的类库-文件操作类

 1 class hylaz_file{
 2     /**
 3      * Read file
 4      * @param string $pathname
 5      * @return string content
 6      */
 7     public static function read_file($pathname){
 8         return @file_get_contents($pathname);
 9     }
10     /**
11      * Write File
12      * @param string $pathname 文件名称
13      * @param string $data  写入到文件的数据
14      * @param string $md 打开文件模式
15      * @return int bool
16      */
17     public static function  write_file($pathname,$data,$md='wb'){
18         if(!$fp=fopen($pathname,$mode))
19             return false;
20         flock($fp,LOCK_EX);
21         for($result=$written=0,$length=strlen($data),$written<$length;$written+=$result){
22             if(($result=fwrite($fp,substr($data,$written)))===FALSE){
23                 break;
24             }
25         }
26         flock($fp, LOCK_UN);
27         fclose($fp);
28         return is_int($result);
29     }
30     /**
31      * 获取文件信息
32      * @param string path of file
33      * @param array array or comma separated string of information returned
34      * @return array
35      */
36     public static function file_info($file,$return_value=array('name', 'server_path', 'size', 'date')){
37         if(!file_exists($file)){
38             return false;
39         }
40         if(is_string($return_value)){
41             $return_value=explode(",",$return_value);
42         }
43         foreach($return_value as $key){
44             switch ($key){
45                 case "name":
46                     $fileinfo['name']=basename($path);
47                     break;
48                 case "server_path":
49                     $fileinfo['server_path']=$file;
50                     break;
51                 case 'date':
52                     $fileinfo['date']=filemtime($file);
53                     break;
54                 case 'size':
55                     $fileinfo['size']=filesize($file);
56                     break;
57                 case 'readable':
58                     $fileinfo['readable']=is_readable($file);
59                     break;
60                 case 'writable':
61                     $fileinfo['writable']=is_writable($file);
62                     break;
63                 case 'executable':
64                     $fileinfo['executable']=is_executable($file);
65                     break;
66                 case 'fileperms':
67                     $fileinfo['fileperms']=fileperms($file);
68                     break;
69                 
70                     
71             }
72         }
73         return $fileinfo;
74     }
75     /**
76      * 获得八进制的权限位
77      * @param string $perms
78      * @return string 
79      */
80     public static function octal_permissions($perms){
81         return substr(sprintf("%o",$perms), -3);
82     }
83 }