Example Plugin to Send Data to SAAS Backend from WordPress

wcatl-notify.php

<?php
	
function wcatl2016_transition_post_status( $new_status, $old_status, $post ) {
	$api_url = 'https://lewayotte.com/?wcatl=1';
	if ( 'publish' === $new_status && 'publish' !== $old_status ) {
		$args = array(
			'headers'	=> array( 'content-type' => 'application/json' ),
			'body'		=> json_encode( array( 'post-id' => $post->ID ) ),
		);
		$response = wp_remote_post( $api_url, $args );
		
		if ( !empty( $response ) && is_wp_error( $response ) ) {
			error_log( sprintf( __( 'Error: %s', 'wcatl2016-api' ), $response->get_error_message() ) );
		}
	}
}
add_action( 'transition_post_status', 'wcatl2016_transition_post_status', 100, 3 );