PHP & SQL

public function find($user = null) {
		if ($user) {
			$field = (is_numeric($user)) ? 'id' : 'username';
			$data = $this->_db->get('users', array($field, '=', $user));

			if ($data->count()) {
				$this->_data = $data->first();
				return true;
			}
		}
		return false;
	}

	public function login($username = null, $password = null, $remember = false) {

		if (!$username && !$password && $this->exists()) {
			Session::put($this->_sessionName, $this->data()->id);
		} else {
			$user = $this->find($username);

			if ($user) {
				if ($this->data()->password === Hash::make($password, $this->data()->salt)) {
					Session::put($this->_sessionName, $this->data()->id);

					if ($remember) {
						$hash = Hash::unique();
						$hashCheck = $this->_db->get('users_session', array('user_id', '=', $this->data()->id));

						if (!$hashCheck->count()) {
							$this->_db->insert('users_session', array(
								'user_id' => $this->data()->id,
								'hash' => $hash
							));
						} else {
							$hash = $hashCheck->first()->hash;
						}

						Cookie::put($this->_cookieName, $hash, Config::get('remember/cookie_expiry'));
					}

					return true;
				}
			}
		}

		return false;
	}