PHP不存储会话ID

Question

I have been silently following along in here and now I joined myself.

I am in the making of a login system, purely for the learning of it, as i am semi-new to PHP (~2 months best guess).

Right now i get the following error (using WAMP and mysql):

"Notice: Undefined property: stdClass::$id in C:\\wamp64\\www\\login\\classes\\user.php on line 44"

This is the line WAMP is telling:

            session::put($this->_sessionName, $this->data()->id);

And here is the put(& get) function used:

public static function put($name, $value){
    return $_SESSION[$name] = $value;
}

public static function get($name){
    return $_SESSION[$name];}

My Login-system is working up until this login-point, even hash's and everything.

I am trying to store the ID of the user, so that when i want to check if it is functioning with the following:

echo session::get(config::get('session/session_name'));

after doing this in my user class:

$this->_sessionName = config::get('session/session_name');

It should just give me the number of the ID on the user (eg 2, if the user ID is 2(ID is auto incremented)). (the config holds basic arrays for DB-connection, session and token etc.)

But it is not.

I really hope this is not a duplicate question as i could not find a question that asked for this kind of use.

Is there anybody who can help me in the right direction?

Answer 1

well error is self explanatory

$this->data() in user.php returns stdClass without id

this is matter of simple debugging see what $this->data() returns...

Answer 2

i will suggest you to used a session class with static member function so that you can call that method from any where with its class name

and most importantly use Error Control Operator when ur going start a session.so that if session is going on, system won't start again and error will ignore so u can ensure about session variable

eg:-

<?php

class Session
{

    public static function init()
    {  
        @session_start(); //#
    }

    public static function set($key, $value)
    {
        $_SESSION[$key] = $value;
    }

    public static function get($key)
    {

        if (isset($_SESSION[$key]))
            return $_SESSION[$key];
        else 
            return false;
    }

}

now use it like below:-

    <?php  
     require 'Session.php'; 
 class TestController{ 
    function setData()
    {
        Session::init(); 
        Session::set('user_id',1);//set userid to session
    }

    function getData()
    {
        Session::init(); //this also won't give you error;
        echo Session::get('user_id'); //get or retrieve userid from session
    } 
} 
?>

but use Session::init in constructor for good programming practice ..