user.class.php

  class User{
    // $Conn is the database connection handler defined in db.include.php
    protected $Conn;
    // the constructor links $Conn inside the User class to the one outside of class defined in db.include.php
    public function __construct($Conn) {
      $this->Conn = $Conn;
    }

    public function createUser($user_data) {
      // take users set password and convert to hash value using password_hash method
      $sec_password = password_hash($user_data['password'], PASSWORD_DEFAULT);
      // INSERT values into database using :placeholders
      $query = "INSERT INTO users(user_email, user_pass, user_name) VALUES
      (:user_email, :user_pass, :user_name)";

      $stmt = $this->Conn->prepare($query);
      // execute the statement using an array to pass the values
      return $stmt->execute(array(
        'user_email'=>$user_data['email'],
        'user_pass'=>$sec_password,
        'user_name'=>$user_data['fullName']
        // method complete, refer to join.php
      ));
    }

    public function loginUser($email,$password){
      // query database for users email address
      $query = "SELECT * FROM users WHERE user_email = :user_email";
      $stmt = $this->Conn->prepare($query);
      // execute query using user email
      $stmt->execute(array(':user_email'=>$email));
      // fetch the results of query
      $attempt = $stmt->fetch();

      if($attempt && password_verify($password,$attempt['user_pass'])) {
        return $attempt;
      }else{
        return false;
      }
    }
    public function getUser($user_id){
      // gets all user_id
      $query = "SELECT * FROM users WHERE user_id = :user_id";
      $stmt = $this->$Conn->prepare($query);
      $stmt->execute(array(':user_id' => $user_id));
      return $stmt->fetch();
    }
  }