Forminator - simulate any 3rd party standard HTML form and send data as POST request to any URL, just like typical HTML form

forminator-send-to-external-url-like-html-form.php

<?php 
/*
Forminator - send to eternal url like HTML form

This basically "emulates" any standard 3rd-party HTML form with Forminator
Example use - whenever you need to put standard HTML form on WP site but want to use/integrate Formiantor instead, 
created for Capsule CRM initially (their "webform integration") but can be used practically with enything else

Tested with Forminator 1.17.1 - 1.24.6

by adamcz/WPMU DEV

USE AS MU PLUGIN
Config explained in comments
*/

add_filter( 'forminator_custom_form_submit_field_data', 'forminator_external_url_post', 10, 2);
function forminator_external_url_post( $field_data, $id ) {
	
	### config below ###
	
	$form_ids = array( 123 ); // ID of form(s) to push to external source; one or more, comma separated
	$target_url = 'https://external-form-action-url_OR_webhook_url.com'; // URL to post data to 
	
	$do_json = true; // if to JSON encode data or not
	
	// Map form fields to target fields; 
	// array element key is local form field ID
	// array element value is remote field
		
	$field_mapping = array( 
		'name-1' => 'FIRST_NAME',
		'text-1' => 'DESC', 
		'date-1' => 'EVENT_DATE',
	);
	
	
	/* additional "hidden" data to send 
	 modify to your needs; format is 
	array_key is "target" form field name
	array_value is "target" form field value
	*/
	$fields_extra = array(
		'FORM_ID' => '123', 
		'HIDDEN_MSG' => 'Hey! I am hidden field!', 
	);
	
	#### END OF CONFIG; DON"T EDIT BELOW ###
	$request_args = array(
		'method' => 'POST',
		'timeout' => 30,
	);
	$request_body = array();
	
	
	if ( in_array( $id, $form_ids ) ) {
		
		// loop through all submitted fields
		foreach ( $field_data as $single_field) {
			
			// loop through fields mapping 
			foreach ( $field_mapping as $field_local => $field_remote ) {
				
				if ( $single_field['name'] == $field_local ) {
					$request_body[$field_remote] = $single_field['value'];
				}
				
				
			}
			
		}
		
		// combine request settings, extra and body to single arg array
		$request_args['body'] = array_merge( $fields_extra, $request_body );
		
		// jsone encode if enabled
		if ( $do_json ) { 
		
			$request_args['body'] = json_encode( $request_args['body'] );
			$request_args['headers'] = array(
				'Content-Type' => 'application/json',
				'Content-Lenght' => strlen( $request_args['body'] )
				);
		
		}
		
		// and POST data to remote service
		$response = wp_remote_post( $target_url, $request_args );
			
		// log response if debugging enabled
		if ( defined( 'WP_DEBUG' ) && true === WP_DEBUG ) {
			error_log( print_r( $response, true ) );
		}
		
		
	}
		
	// return unchanged field data
	return $field_data;
	
}