如何使用password_hash进行登录和注册

Question

**我正在尝试弄清楚如何在注册和登录系统上使用password_hash。 目前，我正在像这样使用password_hash来注册我的用户。**我正在尝试通过phpmysql使用密码哈希。问题是password_verify到目前为止似乎不适用于我。谁能告诉我如何验证password_hash功能？

    <?php
        include_once "Session.php";
        include_once "Database.php";

    class User
    {
        private $db;
        public function __construct()
        {
            $this->db = new Database();
        }

        public function userRegistration($data){
            $name = $data['name'];
            $username = $data['username'];
            $email = $data['email'];
            $password = $data['password'];
            if (strlen($password) < 6){
                $msg = "<div class='alert alert-danger'> <strong> Error!</strong> Password must be 
                 character length</div>";
                return $msg;
           }elseif (!preg_match('#[A-Z]+#', $password)){
               $msg = "<div class='alert alert-danger'> <strong> Error!</strong> Password must contain 1 
                   uppercase letter</div>";
               return $msg;
           }elseif (!preg_match('#[a-z]+#', $password)){
               $msg = "<div class='alert alert-danger'> <strong> Error!</strong> Password must contain 1 
                   lowercase letter</div>";
               return $msg;
           }elseif (!preg_match('#[0-9]+#', $password)){
               $msg = "<div class='alert alert-danger'> <strong> Error!</strong> Password must contain 1 
              number</div>";
               return $msg;
            }else{
                $pass_hash = password_hash( $password, PASSWORD_BCRYPT );
            }

            $check_email = $this->checkEmail($email);

            if ($name == '' || $username == '' || $email == '' || $password == ''){
                $msg = "<div class='alert alert-danger'> <strong> Error!</strong> Filed must not be 
              empty</div>";
                return $msg;
            }
            if (strlen($username) < 3){
                $msg = "<div class='alert alert-danger'> <strong> Error!</strong> Username is too 
            short</div>";
                return $msg;
            }
            elseif (preg_match('/[^a-z0-9_-]/i', $username)){
                $msg = "<div class='alert alert-danger'> <strong> Error!</strong> Username only contain 
               alphanumeric, dashes and underscores!</div>";
                return $msg;
            }
            if (filter_var($email, FILTER_VALIDATE_EMAIL ==false)){
                $msg = "<div class='alert alert-danger'> <strong> Error!</strong> Please enter a valid 
                email address</div>";
                return $msg;
            }
            if ($check_email == true){
                $msg = "<div class='alert alert-danger'> <strong> Error!</strong> Email already 
               exits</div>";
                return $msg;
            }

            $sql = "INSERT INTO users (name, user_name, email, password) VALUES (:name, :username, 
            :email, :pass_hash)";
            $query = $this->db->pdo->prepare($sql);
            $query->bindValue(':name',$name);
            $query->bindValue(':username',$username);
            $query->bindValue(':email',$email);
            $query->bindValue(':pass_hash',$pass_hash);
            $query->execute();
            if ($query){
                $msg = "<div class='alert alert-success'> <strong> Successful!</strong> You have been 
               registered</div>";
                return $msg;
            }else{
                $msg = "<div class='alert alert-danger'> <strong> Error!</strong> Try again</div>";
                return $msg;
            }
        }

        public function checkEmail($email){
            $sql = "SELECT email FROM users WHERE email = :email";
            $query = $this->db->pdo->prepare($sql);
            $query->bindValue(':email',$email);
            $query->execute();
            if ($query->rowCount() > 0){
                return true;
            } else{
                return false;
            }
        }
        public function userLogin($data){
            $email = $data['email'];
            $password = $data['password'];
    //        $pass_hash = password_hash($password, PASSWORD_BCRYPT);
            $check_email = $this->checkEmail($email);

            if ( $email == '' || $password == ''){
                $msg = "<div class='alert alert-danger'> <strong> Error!</strong> Filed must not be 
            empty</div>";
                return $msg;
            } elseif (filter_var($email, FILTER_VALIDATE_EMAIL ==false)){
                $msg = "<div class='alert alert-danger'> <strong> Error!</strong> Please enter a valid 
              email address</div>";
                return $msg;
            } else if ($check_email == false){
                $msg = "<div class='alert alert-danger'> <strong> Error!</strong> Email not 
               found</div>";
                return $msg;
            }
            $result = $this->getLoginUser($email, $password);
            if ($result){
                Session::init();
                Session::set('login', true);
                Session::set('id', $result->id);
                Session::set('name', $result->name);
                Session::set('username', $result->user_name);
                Session::set('loginmsg',"<div class='alert alert-success'> <strong> Success!</strong> 
               You are logged in</div>" );
                header("location:index.php");
            }else{
                $msg = "<div class='alert alert-danger'> <strong> Error!</strong> Try Again</div>";
                return $msg;
            }
        }
        public function getLoginUser($email, $password){
            $sql = "SELECT * FROM users WHERE email = :email AND password = :password";
            $query = $this->db->pdo->prepare($sql);
            $query->bindValue(':email',$email);
            $query->bindValue(':password',$password);
            $query->execute();
            $value = $query->fetch(PDO::FETCH_OBJ);
            return $value;
        }
    }

**Can anyone help me to solve this problem?**