Call to a member function prepare(), Problem z wykonaniem zapytania. Opcje

[kacper15]

Witam forumowicze, mam mały problem i niestety nie wiem jak sobie z nim poradzić. Wstawiam klasy odpowiedzalne za rejestracje uzytkownika do bazy. Niestety nie wiem w czym jest problem i prosilbym o pomoc. W php tak na prawde dopiero raczkuje i sie ucze dlatego prosze o wyrozumiałość. W postmenie zwraca mi błąd : Call to a member function prepare()

[PHP] pobierz, plaintext 
<?php
 
class Users{
    public $email;
    public $encrypted_password;
    public $username;
 
    private $conn;
    private $user_table;
 
    public function __construct($db){
        $this->conn = $db;
        $this->user_table = "users";
    }
    public function create_user()
    {
        $user_query = "'INSERT INTO users (username, email, encrypted_password) VALUES(?, ?, ?)'";
        $user_obj = $this->conn->prepare($user_query);
        $user_obj->bind_param("sss", $this->username, $this->email, $this->encrypted_password);
 
        if($user_obj->execute()){
 
            return true;
        }
        return false;
    }
}
?>
[PHP] pobierz, plaintext 

[PHP] pobierz, plaintext 
<?php
class Database{
 
    // specify your own database credentials
    private $host = "localhost";
    private $db_name = "spot";
    private $username = "root";
    private $password = "";
    public $conn;
 
    // get the database connection
    public function getConnection(){
 
        $this->conn = null;
 
        try{
            $this->conn = new PDO("mysql:host=" . $this->host . ";dbname=" . $this->db_name, $this->username, $this->password);
            $this->conn->exec("set names utf8");
        }catch(PDOException $exception){
            echo "Connection error: " . $exception->getMessage();
        }
 
        return $this->conn;
    }
}
?>
 
 
[PHP] pobierz, plaintext 

[PHP] pobierz, plaintext 
<?php
 
header("Access-Control-Allow_Origin: *");
header("Access-control_Allow-Methods: POST");
header("Content-type: application/json; charst=UTF-8");
 
include_once 'database.php';
include_once 'Users.php';
 
 
$db = new Database();
$connection = $db ->conn;
 
 
 
$user_obj = new Users($connection);
 
if($_SERVER['REQUEST_METHOD'] === "POST"){
    $data = json_decode(file_get_contents("php://input"));
    if(!empty($data->email) && !empty($data->encrypted_password) && !empty($data->username)){
        $user_obj->email = $data->email;
        $user_obj->encrypted_password = $data->encrypted_password;
        $user_obj->username = $data->username;
 
 
 
        if($user_obj->create_user()){
            http_response_code(200);
            echo json_encode(array(
                "status" =>1,
                "message"=> "User has been created"
            ));
 
        }else{
            http_response_code(500);
            echo json_encode(array(
                "status" =>0,
                "message" =>"Failed to save user"
            ));
        }
    }else{
        http_response_code(500);
        echo json_encode(array(
            "status" =>1,
            "message"=> "All data needed"
        ));
    }
}else{
    http_response_code(503);
    echo json_encode(array(
        "status" =>0,
        "message" => "Access Denied"
    ));
}
 
 
?>
[PHP] pobierz, plaintext 

Ten post edytował kacper15 2.02.2020, 12:33:00

[kacper15]

tak zrobilem ... W postmenie wyswietlilo mi sie ze wartosc jest NULL:


NULL
<br />
<b>Fatal error</b>: Uncaught Error: Call to a member function prepare() on null in C:\xampp\htdocs\rest_api_spot\Users.php: 19
Stack trace:
#0 C:\xampp\htdocs\rest_api_spot\create-user-api.php(27): Users-&gt;create_user()
#1 {main
}
thrown in <b>C:\xampp\htdocs\rest_api_spot\Users.php</b> on line <b>19</b><br />