Start';
auto_dir($dir);
echo '
Finished
';

/**
 * 检测文件编码
 * @param string $file 文件路径
 * @return string|null 返回 编码名 或 null
 */
function detect_encoding($file) {
     $list = array('GBK', 'UTF-8', 'UTF-16LE', 'UTF-16BE', 'ISO-8859-1');
     $str = file_get_contents($file);
     foreach ($list as $item) {
         $tmp = mb_convert_encoding($str, $item, $item);
         if (md5($tmp) == md5($str)) {
             return $item;
         }
     }
     return null;
}

/**
* 自动解析编码读入文件
* @param string $file 文件路径
* @param string $charset 读取编码
* @return string 返回读取内容
*/
function auto_read($file, $charset='UTF-8') {
    $list = array('GBK', 'UTF-8', 'UTF-16LE', 'UTF-16BE', 'ISO-8859-1');
     $str = file_get_contents($file);
     foreach ($list as $item) {
        $tmp = mb_convert_encoding($str, $item, $item);
        if (md5($tmp) == md5($str)) {
             return mb_convert_encoding($str, $charset, $item);
         }
     }
    return "";
}




function auto_dir($path){	//自定义函数递归的复制带有多级子目录的目录
    if($dir_handle = opendir($path)){
        while( $filename = readdir($dir_handle)){
            if( ($filename != '.') && ($filename != '..')){
                $sub_file = $path. '/'. $filename;
                if(is_dir($sub_file)){
                    auto_dir($sub_file);
                }

                //设置要检查的文件类型
                if(is_file($sub_file) && ( (substr($filename, -4) == '.php') || (substr($filename, -4) == '.htm') || (substr($filename, -5) == '.html') || (substr($filename, -3) == '.js'))){
                    checkBOM($sub_file);
                    $encode = detect_encoding($sub_file);
                    if ($encode == 'GBK') {
                        $tmp_str = 'GBK';
                    } else {
                        $tmp_str = ''. $encode. '';
                    }
                    echo '---------------------------------->'. $tmp_str;
                    echo '
';
                }
            }
        }
        closedir($dir_handle);
    }
}


function checkBOM ($filename) {
    echo $filename .'-------->';
    global $auto;
    $contents=file_get_contents($filename);
    $charset[1]=substr($contents, 0, 1);
    $charset[2]=substr($contents, 1, 1);
    $charset[3]=substr($contents, 2, 1);
    if (ord($charset[1])==239 && ord($charset[2])==187 && ord($charset[3])==191) {
        if ($auto==1) {
            $rest=substr($contents, 3);
            //rewrite ($filename, $rest);
            echo " BOM found, automatically removed.";
        } else {
            echo " BOM found.";
        }
    } else {
        echo "BOM Not Found.";
    }
    //echo '';
}


function rewrite ($filename, $data) {
    $filenum=fopen($filename,"w");
    flock($filenum,LOCK_EX);
    fwrite($filenum,$data);
    fclose($filenum);
}