<?php/** * 把一個文件夾里的文件全部轉碼 只能轉一次 否則全部變亂碼 * @param string $filename */function iconv_file($filename,$input_encoding='gbk',$output_encoding='utf-8'){  if(file_exists($filename))  {    if(is_dir($filename))    {      foreach (glob("$filename/*") as $key=>$value)      {        iconv_file($value);      }    }    else    {      $contents_before = file_get_contents($filename);      /*$encoding = mb_detect_encoding($contents_before,array('CP936','ASCII','GBK','GB2312','UTF-8'));      echo $encoding;      if($encoding=='UTF-8') mb_detect_encoding函數不工作      {        return;      }*/      $contents_after = iconv($input_encoding,$output_encoding,$contents_before);      file_put_contents($filename, $contents_after);    }  }  else  {    echo '參數錯誤';    return false;  }}iconv_file('./test');?>