Encriptar y comprobar contraseña con PHP

Clase para encriptar y comprobar una contraseña con PHP

<?php
class EncrypterPop {
  protected static $slt = 'Contraseñaaaaaa.659';
  protected static $method_pass = 'PASSWORD_ARGON2I';
  protected static $cost;

  function __construct(){
    self::$cost = 11;
  }

  private function checkCostEncrypt(){
    $timeTarget = 0.080; // 80 milliseconds

    do {
      $this->cost++;
      $start = microtime(true);
      password_hash("test", PASSWORD_DEFAULT, ["cost" => $this->cost]);
      $end = microtime(true);
    } while (($end - $start) < $timeTarget);

    echo $this->cost;
  }

  public static function encryptPass($pass){
    $pasy = hash_hmac("sha512", $pass, self::$slt);

    $options = array();
    if(self::$method_pass == 'PASSWORD_DEFAULT'):
      $options = ['cost' => self::$cost];
    elseif(self::$method_pass == 'PASSWORD_ARGON2I'):
      // https://stackoverflow.com/questions/47602044/how-do-i-use-the-argon2-algorithm-with-password-hash
      $options = ['memory_cost' => 2048, 'time_cost' => 4, 'threads' => 3];
    endif;

    return password_hash($pasy, PASSWORD_ARGON2I, $options);
  }

  public static function checkPass($pass,$passDataBase){
    $pasy = hash_hmac("sha512", $pass, self::$slt);

    if(password_verify($pasy, $passDataBase)):
      return true;
    else:
      return false;
    endif;
  }
}
?>

$p_post = $_POST['contraseña'];

// Encriptar y la guardamos en la base de datos
$p_encriptada = EncrypterPop::encryptPass($p_post);

// Comprobar contraseña
$p_base_datos = 'Contraseña encriptada de la base de datos';
if(EncrypterPop::checkPass($p_post,$p_base_datos)){
// todo bien 
}else{
// la contraseña indicada esta mal
}