尽管设置了laravel会话返回null

Just a simple function in native php

protected function some_function(){
    session_start();
    if(!isset($_SESSION['a']))
    {
        $_SESSION['a'] = 'some value';
        return true;
    } else {
        return $_SESSION['a'];
    }
 }

on the 1st run, it will return bool(true) and then "some value" as expected.

Applying the same to laravel session,

protected function some_function(){ 
    $a = Session::get('abc');
    if(is_null($a)){
        Session::put('abc', 'some value');
        //return Session::get('abc');
        return true;
    } else {
        return $a;
    }
 }

By logic, on the 1st run, $a will be null. and then puts "some value" in abc key and returns bool(true) as expected.

However on consequent access, the Session::get('abc') returns null every time. so every attempt returns bool(true).

I assumed may be session wasn't writing properly so i checked with getting the key value right after setting it.

by commenting out the line in the above code, it returns whatever value i put in Session::put('abc'). So there is no error in writing the data.

Problem here is trying to retrieve the value always returns null though i have set after the 1st request.

Am i missing something here?

EDIT

Using database as the driver, The sessions does not get save in database. No error is outputted. Database implementation has been correct with sessions table schema as described in docs.

Try this snippet. Untested, but pretty sure it works.

if(Session::has('abc'))
{
    return Session::get('abc');
} else {
    Session::put('abc', 'some value');
    return true;        
}

After going through many forum to solve same issue, I solved it by setting my session driver to database.

    'driver' => 'database',

and created table in database

 CREATE TABLE `sessions` (
  `id` varchar(40) NOT NULL,
  `last_activity` int(10) NOT NULL,
  `data` text NOT NULL,
  PRIMARY KEY (`id`)
) ENGINE=InnoDB DEFAULT CHARSET=latin1;