PHP遍历目录下的文件夹和文件 以及遍历文件下内容

1.遍历目录下的文件夹和文件：

 public function bianli1($dir)
     {
         $files = array();
         if($head = opendir($dir))
         {
             while(($file = readdir($head)) !== false)
             {
                 if($file != ".." && $file!=".")
                 {
                    if(is_dir($file))
                    {
                        $files[$file]=bianli1($dir.'/'.$file);
                    }
                    else
                    {
                        $files[]=$file;
                    }
                 }
             }
         }
         closedir($head);
         return $files;
     }

2.遍历文件下内容：

 function bianli2()
     {
         $hostdir= iconv("utf-8","gbk","D:/wamp/www") ;
         $filesnames = scandir($hostdir);
         foreach ($filesnames as $name) {
             if($name!=".." && $name!=".")
             {
                 $cipath = $hostdir.$name;
                 $cjfilenames = scandir($cipath);
                 foreach($cjfilenames as $cjname)
                 {
                     if($cjname!=".." && $cjname!="." &&!is_dir($cipath."/".$cjname))
                     {
                         $str = file_get_contents($cipath."/".$cjname);
                         file_put_contents("D:/test.txt",$str,FILE_APPEND);
                     }
                 }
             }
             echo "\n";
         }
     }