使用.htaccess作为URL缩短器是否安全

Question

首先抱歉我的英语不好

我制作了一个附加

的php脚本

$code = "Redirect /".$shorted." ".$_POST['url'];

在.htaccess中

这是我的代码

function randWord($len = 3) {
  $word = array_merge(range('a', 'z'), range('A', 'Z'));
  shuffle($word);
  return substr(implode($word), 0, $len);
}

$passwords = ['1st Pass','2nd Pass','3rd pass'];

if(isset($_POST['url']) && isset($_POST['password'])){

  if(in_array($_POST['password'],$passwords)){
    if(!isset($_COOKIE['password'])){
      $cookie_name = "password";
      $cookie_value = $_POST['password'];
      setcookie($cookie_name,$cookie_value,time() + (86400 * 3),"/shortner.php");
      }
    if(!empty($_POST['url']) && !empty($_POST['password'])){
      if(filter_var($_POST['url'], FILTER_VALIDATE_URL)){
        $number = rand(0,999);
        $shorted = randWord(1).$number.randWord(2);
        $txt = "Redirect /".$shorted." ".$_POST['url'];
        if(file_put_contents('.htaccess', $txt.PHP_EOL , FILE_APPEND | LOCK_EX)){
          $status = "https://wstm.ir/".$shorted;
          $error = false;
        }else{
          $status = "Something Went Wrong ...";
          $error = true;
        }
      }else{
        $status = "You Must Enter a valid URL ... ";
        $error = true;
      }
    }else{
      $status = "All Fields Must complete";
      $error = true;
    }
  }else{
    $status = "Password Is Wrong!";
    $error = true;
  }

}

我想知道使用它是否安全？ 我不想让所有人都把它作为网址缩短器公开