<?php
    define ( 'HOST', 'localhost' );
    define ( 'USER', 'root' );
    define ( 'PASS', 'isoevumed2004' );
    define ( 'DB', 'oopregister' );

    /** @noinspection PhpUndefinedClassInspection */
    class DB
    {
        function __construct ()
        {
            /** @noinspection PhpParamsInspection */
            $con = mysqli_connect ( HOST, USER, PASS, DB ) or die( mysqli_error () );
        }
    }

    class User
    {
        public function __construct ()
        {
            /** @noinspection PhpUnusedLocalVariableInspection */
            $db = new DB;
        }

        public function register ($trn_date, $name, $username, $email, $pass)
        {
            $pass = md5 ( $pass );
            /** @noinspection PhpParamsInspection */
            $con = mysqli_connect ( HOST, USER, PASS, DB ) or die( mysqli_error () );
            $checkuser = mysqli_query ( $con, /** @lang text */
                "Select id from users where email='$email'" );
            $result = mysqli_num_rows ( $checkuser );
            if ( $result == 0 ) {
                $register = mysqli_query ( $con, /** @lang text */
                    "Insert into users (trn_date, name, username, email, password) values ('$trn_date','$name','$username','$email','$pass')" ) or die( mysqli_error () );
                return $register;
            } else
            {
                return false;
            }
        }

        public function login ($email, $pass)
        {
            $pass = md5 ( $pass );
            /** @noinspection PhpParamsInspection */
            $con = mysqli_connect ( HOST, USER, PASS, DB ) or die( mysqli_error () );
            $check = mysqli_query ( $con, /** @lang text */
                "Select * from users where email='$email' and password='$pass'" );
            $data = mysqli_fetch_array ( $check );
            $result = mysqli_num_rows ( $check );
            if ( $result == 1 )
            {
                $_SESSION[ 'login' ] = true;
                $_SESSION[ 'id' ] = $data[ 'id' ];
                return true;
            } else
            {
                return false;
            }
        }

        public function fullname ($id)
        {
            /** @noinspection PhpParamsInspection */
            $con = mysqli_connect ( HOST, USER, PASS, DB ) or die( mysqli_error () );
            $result = mysqli_query ( $con, /** @lang text */
                "Select * from users where id='$id'" );
            $row = mysqli_fetch_array ( $result );
            echo $row[ 'name' ];
        }

        public function session ()
        {
            if ( isset( $_SESSION[ 'login' ] ) ) {
                return $_SESSION[ 'login' ];
            }
        }

        public function logout ()
        {
            $_SESSION[ 'login' ] = false;
            session_destroy ();
        }
    }