authUser(event){
    let formData = new FormData();
    formData.append('uname',event.target[0].value);
    formData.append('pwd',event.target[1].value);
    this.http.post('http://localhost/auth.php', formData)
    .subscribe((data) => {
        let dat = data.json();
        if (dat){
            this.user.setUserBase();
            this.route.navigate(['report']);
        }
    }, (error) => {
        console.log("Error!", error);
    });
}

@Injectable()
export class UserbaseService {
    private isLoggedIn;

    constructor() {
        this.isLoggedIn = false;
    }
    setUserBase(){
        this.isLoggedIn = true;
    }
    getUserBase(){
        return (this.isLoggedIn);
    }
}

const appRoutes: Routes = [
    {
        path: '',
        component: HomeComponent
    },
    {
        path: 'upload',
        canActivate: [AuthGuard],
        component: UploadComponent
    },
]

canActivate(
    next: ActivatedRouteSnapshot,
    state: RouterStateSnapshot): Observable<boolean> | Promise<boolean> | boolean {
    return this.user.getUserBase();
}

<?php
    session_start();
    header('Access-Control-Allow-Origin: *');
    require('connect.php');
    $username = $_POST['uname'];
    $password = $_POST['pwd'];
    $query = "SELECT * FROM auth WHERE uname='$username' and passwd='$password'";
    $result = mysqli_query($connection, $query) or die(mysqli_error($connection));
    $count = mysqli_num_rows($result);

    if (!isset($myObj))
         $myObj = new stdClass();

    if ($count == 1){
        $_SESSION['username'] = $username;
    }
    if (isset($_SESSION['username'])){
        $myObj->user = $username;
        $myObj->status = "authentic";
    }
    $response = json_encode($myObj);
    echo ($response);
?>