文件操作

  1 <?php
  2 
  3 //文件：文件和文件夹
  4 
  5 //1.判断文件
  6 //var_dump(filetype("./aa"));
  7 //var_dump(is_dir("./aa"));
  8 //echo date("Y-m-d H:i:s",fileatime("./aa.txt"));
  9 //echo filesize("aa.txt");<br />
 10 //var_dump(file_exists("./aaa.txt"));
 11 
 12 //2.文件路径
 13 //根: / 
 14 //php里面/代表根（是磁盘目录）
 15 //var_dump(file_exists("/wamp/www/11.php"));
 16 //网页里面/代表根(是www目录)
 17 
 18 //echo $_SERVER['DOCUMENT_ROOT'];
 19 //echo basename("/wamp/www/11.php",".php");
 20 //echo dirname("/wamp/www/11.php");
 21 //var_dump(pathinfo("/wamp/www/11.php"));
 22 //echo realpath("./aa.txt");
 23 
 24 //目录操作
 25 //rmdir("./bb");//只能删除空文件夹
 26 //rename("./cc","./aa/dd");
 27 //var_dump(glob("./fenye/*.php"));
 28 
 29 /*$dir = opendir("./fenye");
 30 
 31 while($f = readdir($dir))
 32 {
 33     echo $f."<br>";
 34 }
 35 
 36 closedir($dir);*/
 37 
 38 //给一个文件夹，读取文件夹里面文件的数量
 39 
 40 /*echo ShuLiang("./fenye");
 41 
 42 //给一个文件夹，返回该文件夹下所有文件的数量
 43 function ShuLiang($filename)
 44 {
 45     $sum=0;
 46     
 47     $dir = opendir($filename);
 48     while($f = readdir($dir))
 49     {
 50         if($f=="." || $f=="..")
 51         {
 52         }
 53         else
 54         {
 55             $lujing = $filename."/".$f;
 56             if(is_file($lujing))
 57             {
 58                 $sum++;
 59             }
 60             else
 61             {
 62                 $sum = $sum+ShuLiang($lujing);
 63             }
 64         }
 65     }
 66     closedir($dir);
 67     
 68     return $sum;
 69 }*/
 70 
 71 
 72 //文件操作
 73 //touch("./cc.docx");
 74 //copy("./cc.txt","./fenye/cc.txt")
 75 //unlink("./cc.txt");
 76 
 77 //echo file_get_contents("http://www.baidu.com");
 78 //file_put_contents("./ceshi.php","hello");
 79 //readfile("http://www.baidu.com");
 80 //var_dump(file("http://www.baidu.com"));
 81 
 82 //$f = fopen("./aa.txt","a");
 83 //fwrite($f,"world");
 84 //echo fgetc($f);
 85 //echo fgets($f);
 86 //echo fread($f,2);
 87 
 88 //fclose($f);
 89 
 90 //给一个文件夹，删除该文件夹
 91 ShanChu("./zhanneixin");
 92 function ShanChu($filename)
 93 {
 94     if(is_dir($filename))
 95     {
 96         $dir = opendir($filename);
 97         
 98         while($f = readdir($dir))
 99         {
100             if($f=="."||$f=="..")
101             {
102                 
103             }
104             else
105             {
106                 $fname = $filename."/".$f;
107                 if(is_file($fname))
108                 {
109                     unlink($fname);
110                 }
111                 else
112                 {
113                     ShanChu($fname);
114                 }
115             }
116         }
117         
118         closedir($dir);
119         rmdir($filename);
120     }
121     else
122     {
123         unlink($filename);
124     }
125 }
126 
127 
128 ?>