FluentForms Server-side Facebook Conversions API

functions.php

<?php
/**
 * Functions
 *
 * @package      Facebook Conversions API
 * @since        1.0
 * @link         https://rotsenacob.com/
 * @author       Rotsen Mark Acob <rotsenacob.com>
 * @copyright    Copyright (c) 2020, Rotsen Mark Acob
 * @license      http://opensource.org/licenses/gpl-2.0.php GNU Public License
 *
*/

define( 'PIXEL_ID', 'FB_PIXEL_ID_HERE' ); // Facebook Pixel ID
define( 'ACCESS_TOKEN', 'FB_ACCESS_TOKEN' ); // Facebook Access Token
define( 'API_VERSION', 'v9.0' ); // Facebook API Version
define( 'IP_ADDRESS', $_SERVER['REMOTE_ADDR'] );
define( 'USER_AGENT', $_SERVER['HTTP_USER_AGENT'] );

add_action( 'wp_head', function() {
	global $post;

	$endpoint = 'https://graph.facebook.com/' . API_VERSION . '/' . PIXEL_ID . '/events?access_token=' . ACCESS_TOKEN;

	$data = array(
			'event_name' => 'PageView',
			'event_time' => time(),
			'user_data' => [
				'client_user_agent' => USER_AGENT,
				'client_ip_address' => IP_ADDRESS,
				'em' => hash( 'sha256', 'john.doe@xyz.us' ) // Your email address
			],
			'event_source_url' => get_permalink(),
			'action_source' => 'website',
	);


	wp_safe_remote_post( $endpoint, 
		array( 
			'body' => array(
				'data' => array( json_encode( 
					$data
				) ),
				'test_event_code' => 'TEST12345' // Test Event Code for testing
			),
		) 
	);

}, 10, 1 );

// Track all submissions from FluentForms
add_action( 'fluentform_submission_inserted', function( $entryId, $formData, $form ) {
	global $post;
	
	$endpoint = 'https://graph.facebook.com/' . API_VERSION . '/' . PIXEL_ID . '/events?access_token=' . ACCESS_TOKEN;

	$data = array(
		'event_name' => 'Lead',
		'event_time' => time(),
		'user_data' => [
			'client_user_agent' => USER_AGENT,
			'client_ip_address' => IP_ADDRESS,
		],
		'event_source_url' => get_permalink( intval($formData['__fluent_form_embded_post_id']) ),
		'action_source' => 'website'
	);
	
	$fname = $formData['names']['first_name'];
	$lname = $formData['names']['last_name'];
	$email = $formData['email'];
	$phone = $formData['phone'];

	if ( $fname ) :
		$data['user_data']['fn'] = hash( 'sha256', strtolower( $fname ) );
	endif;

	if ( $lname ) :
		$data['user_data']['ln'] = hash( 'sha256', strtolower( $lname ) );
	endif; 

	if ( $email ) :
		$data['user_data']['em'] = hash( 'sha256', strtolower( $email ) );
	endif;

	if ( $phone ) :
		$data['user_data']['ph'] = hash( 'sha256', $phone );
	endif;

	wp_safe_remote_post( $endpoint, array(
		'body' => array(
			'data' => array( json_encode( 
				$data
			) ),
			'test_event_code' => 'TEST12345' // Test Event Code
		)
	) );

}, 20, 3 );