PHP rewrites the code of files in multi-level directories

// FileName: rewrite.php
// 功能: 重写xxx目录下所有的htm文件(也可以是php文件)
// Author: windlike.cublog.cn
function getFileInfo($dir, $type){
  global $arr_file;
  $mydir = dir($dir);
  while(false !== ($file = $mydir->read())){
    if((is_dir("$dir/$file")) && ($file != ".") && ($file != "..")){
      getFileInfo("$dir/$file",$type);
    }else{
      if(($file != ".") && ($file != "..")){
        $path_info = pathinfo("$file");
        if($path_info["extension"] == $type){
          $arr_file["$dir"][] = $file;
        }
      }
    }
  }
  $mydir->close();
}
function Rewrite_File($content){
  global $arr_file;
  foreach($arr_file as $key=>$arr){
   foreach($arr as $value){
     $file = $key . '/' . $value;
     $fp = fopen($file, 'w');
     fwrite($fp, $content);
     fclose($fp);
    }
  }
}
//
$dir = "xxx";
$type = "htm";
$content = "hello world!n";
getFileInfo($dir, $type);
Rewrite_File($content);
?>

以上文件在我的电脑上已经通过测试。为了使用起来更方便，我试着写了一个Rewrite类，可是运行时总是提示错误: Fatal error: Call to undefined function: getfileinfo() in d:usrwwwhtmltest_class.php on line 24

刚接触php类，路过的朋友帮我看一下是哪里的错误。

// FileName: test_class.php
class Rewrite_File{
  var $file_dir;
  var $file_content;
  var $file_type;
  var $arr_file_info;

  function Rewrite_File($file_dir, $file_content, $file_type){
    $this->file_dir         = $file_dir;
    $this->tem_file_dir     = $file_dir;
    $this->file_content     = $file_content;
    $this->file_type         = $file_type;
  }

  function getFileInfo(){
    $dir = $this->tem_file_dir;
    $mydir = dir($dir);
    while(false !== ($file = $mydir->read())){
      if((is_dir("$dir/$file")) && ($file != ".") && ($file != "..")){
     //
        $this->tem_file_dir = $dir;
     getFileInfo();
     }else{
     if(($file != ".") && ($file != "..")){
         $path_info = pathinfo("$file");
         if($path_info["extension"] == $this->file_type){
         $this->arr_file_info["$dir"][] = $file;
         }
     }
     }
    }
    $mydir->close();
  }

  function rewriteFile(){
    foreach($this->arr_file_info as $key=>$arr){
      foreach($arr as $value){
        $file = $key . '/' . $value;
        $fp = fopen($file, 'w');
        fwrite($fp, $this->content);
        fclose($fp);
     }
    }
  }
}
$option = new Rewrite_File("xxx","hellonworld","htm");
$option->getFileInfo();
echo "";</li>
<li>print_r($option->arr_file_info);</li>
<li>echo "";
$option->rewriteFile();
?>