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";
        }
    }