求帮忙解密，base64code解决办法

eval(base64_decode('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'));
?>

Copyright ? 2014    

/**
 * 本函数可还原常见代码级扰码
 **/
function unscrambler($code) {
  $_file = '';
  if(! is_array($code)) {
    $_file = $code;
    $code = str_replace('__FILE__', "'$code'", str_replace('eval', '$code=', file_get_contents($code)));
    eval('?>' . $code);
  }else {
    extract($code);
    $code = str_replace("eval", '$code=', $code);
    $code = str_replace('__FILE__', "'$_file'", $code);
    eval($code);
  }
  if(strstr($code, 'eval')) return unscrambler(get_defined_vars());
  else return $code;
}
//用法
echo unscrambler( '被扰码文件名' );