WP Shortcode RRF Online

<?php

/*
Plugin Name: ThemeMetal Toolkit
Plugin URI: http://thememetal.com/
Description: This plugin only used for ThemeMetal Compnay theme.
Author: Md Hasibul Hossain
Version: 1.0
Author URI: http://thememetal.com/
*/

function google_map($atts, $content = null){

	$a = shortcode_atts( array(
        'width' => 600,
        'height' => 450,
        'title' => ''
    ), $atts );

    if(is_user_logged_in()){
    	$map= '<iframe src="https://www.google.com/maps/embed?pb=!1m10!1m8!1m3!1d14601.584217945043!2d90.360714!3d23.80451155!3m2!1i1024!2i768!4f13.1!5e0!3m2!1sen!2sbd!4v1502255870576" width="600" height="450" frameborder="0" style="border:0" allowfullscreen></iframe>';
    }else{
    	$map = '<h1>You have to login to view map!</h1>';
    }

    if(!empty($a['title']) && is_user_logged_in()){
    	$map.= '<h1>'.$a['title'].'</h1>';
    }else{
    	$map.= '';
    }

    return $map;
	
}

add_shortcode( 'gmap', 'google_map' );