PHP目录的遍历

<?php   //php目录的遍历  function showDetail($dirname){  $ds = opendir($dirname);  while($file = readdir($ds)){  $path = $dirname."/".$file;  if($file != "." && $file != ".."){  //这里是个坑  if(is_dir($path)){  showDetail($path);                 //递归调用，如果读出的是目录则继续读取  }else{  echo $path."<br/>";  }  }  }  }  $dirname="test";                 //测试一个目录  showDetail($dirname);  ?>