PHP method to sort files in a folder directory

php implements the method of sorting files in a folder directory according to time, name, and size

Function introduction:

opendir() Function Open a directory handle.

readdir() The function returns the file name of the next file in the directory.

array_multisort() The function returns a sorted array. You can enter one or more arrays. The function sorts the first array first, then the other arrays, and if two or more values ​​are the same, it sorts the next array.

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Examples are as follows:

function dir_size($dir,$url){
     $dh = @opendir($dir);             //打开目录，返回一个目录流     $return = array();
      $i = 0;
          while($file = @readdir($dh)){     //循环读取目录下的文件             
              if($file!='.' and $file!='..'){
                  $path = $dir.'/'.$file;     //设置目录，用于含有子目录的情况              
                  if(is_dir($path)){
          }elseif(is_file($path)){
              $filesize[] =  round((filesize($path)/1024),2);//获取文件大小              
              $filename[] = $path;//获取文件名称                                   
              $filetime[] = date("Y-m-d H:i:s",filemtime($path));//获取文件最近修改日期       
              $return[] =  $url.'/'.$file;
          }
          }
          }  
          @closedir($dh);             //关闭目录流          
              array_multisort($filesize,SORT_DESC,SORT_NUMERIC, $return);//按大小排序          
              //array_multisort($filename,SORT_DESC,SORT_STRING, $files);//按名字排序          
              //array_multisort($filetime,SORT_DESC,SORT_STRING, $files);//按时间排序          
              return $return;               //返回文件     
}

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