<?php session_start();
include 'functions.php';
?>


    <form action="register.php" method="post">
        <input type="text" name="login">
        <input type="password" name="password">
        <button>Регистрация</button>
    </form>
<?php
    if(!isset($_SESSION['status'])) {
            echo '<p>Авторизация:</p>
                <form action="login.php" method="post">
             <input type="text" name="login">
             <input type="password" name="password">
             <button>Войти</button>
                </form>';
        }

    if(isset($_SESSION['login'])) {
        echo 'Привет ' . $_SESSION['login'];
    }

    if(isset($_SESSION['status'])) {
            echo '<form enctype="multipart/form-data" action="upload.php" method="post">
                <input type="file" name="file">
                <button>Загрузить фото</button>
                </form>';
        }
?>