push notification to external URL

push.php

<?php

function wp_plugin_event_handler () {
	
	global $post;
	
    $url = 'https://us-central1-smackapp-7eab7.cloudfunctions.net/sendNotification';  
		
	if( get_post_type( $post->ID ) == 'post' ) {
		
		//$myPost = get_post($post_id);
		if( $post->post_modified_gmt == $post->post_date_gmt ){

			// New Post
			$post_data= array(
				'title' => $post->post_title,
				'data' => $post->post_content,
				'topic' => 'news'
			);
			
			return wp_remote_post( $url, array( 'body' => $post_data ) );	
		}	
	}
}

add_action("save_post", "wp_plugin_event_handler");