php 将多个txt文件合并成

function test()
    {
    $hostdir= iconv("utf-8","gbk","C:\Users\原万里\Desktop\日常笔记") ;     //iconv()转换编码方式，将UTF-8转换为gbk，若是报错在gbk后加//IGNORE
    $filesnames = scandir($hostdir);                         //scandir() 函数返回指定目录中的文件和目录的数组。默认升序排列，
    
    foreach ($filesnames as $name) {
             if($name!=".." && $name!=".")                   //遍历结果中会多出‘.’以及‘..’，没有用处，不予处理;
             {
                 $cipath = $hostdir.$name;
                 $cjfilenames = scandir($cipath);                    //根据情况再决定是否再向下遍历一次
                 foreach($cjfilenames as $cjname)
                 {
                       if($cjname!=".." && $cjname!="." &&!is_dir($cipath."/".$cjname))
                         {
                             $str = file_get_contents($cipath."/".$cjname);
                             file_put_contents("e:/test.txt",$str,FILE_APPEND);
                         }
                 }
             }
         echo "\n";
    }
    }