[Forminator Pro] - Custom Prefill shortcode

forminator-render-prefill.php

<?php
/**
 * Plugin Name: [Forminator Pro] - Custom Prefill shortcode
 * Description: Adds the [wpmudev_forminator_form] which accepts custom prefill values passed as a discrete parameters, for example [wpmudev_forminator_form id="6" foo="bar" bar="baz"]
 * Author: Anderson Salas @ WPMUDEV
 * Task: SLS-3388
 * Author URI: https://premium.wpmudev.org
 * License: GPLv2 or later
 */

if ( ! defined( 'ABSPATH' ) || ( defined( 'WP_CLI' ) && WP_CLI ) ) {
	return;
}

add_shortcode( 'wpmudev_forminator_form', function( $atts = array() ) {
	if ( empty( $atts['id'] ) ) {
		return;
	}
	
	// Backup the $_GET/$_REQUEST data.
	$base_get     = $_GET;
	$base_request = $_REQUEST;

	$id  = $atts['id'];
	unset( $atts['id'] );

	foreach ( $atts as $name => $value ) {
		$_GET[ $name ]     = $value;
		$_REQUEST[ $name ] = $value;
	}

	// NOTE: This only works if the target form has previously configured its
	//       "Pre-populate" field attributes.
	$html = do_shortcode( sprintf( '[forminator_form id="%d"]', $id ) );

	// Restore the original data.
	$_GET     = $base_get;
	$_REQUEST = $base_request;

	return $html;
});