<?php 
if (!isset($_SESSION)) session_start ();
	//session_start();
	//include "auth.php";
print_r($_SESSION);
?>
...

<?php
	if (!isset($_SESSION)) session_start ();
	var_dump($_SESSION);

	if (isset($_SESSION['id']) && $_SESSION['id'] === true) {
  		echo $_SESSION['id'];
	}

	echo $_SESSION['email'];
	echo $_SESSION['password'];
	echo $_SESSION['firstname'];
	echo $_SESSION['id'];

	print_r($_SESSION);
?>
...

<?php
	if (!isset($_SESSION)) session_start ();
	//phpinfo();
	var_dump($_SESSION);
	/*if (isset($_SESSION['userid']) && $_SESSION['userid'] === true) {
  		echo $_SESSION['userid'];
	}*/
	if(isset($_SESSION['id']) && !empty($_SESSION['id'])){
		echo "yes";
	} else echo "string";

	echo $_SESSION['email'];
	echo $_SESSION['password'];
	echo $_SESSION['firstname'];
	echo $_SESSION['id'];

	print_r($_SESSION);
?>
...

<?php
		$email = $_GET['emailA'];
        /*$password = md5($_GET['passwordA']);*/ //uncomment
        $password = $_GET['passwordA'];
        $status = "default";
        $status = $_GET['radio'];
...