[Forminator] - Toggle PayPal button. Extend existing functionality of Forminator to include a conditional submit and PayPal button

wpmudev-forminator-paypal-submit-buttons.php

<?php
/**
 * Plugin Name: [Forminator] - Add submit button to an existing form with PayPal button
 * Plugin URI: https://premium.wpmudev.org/
 * Description: Extend existing functionality of Forminator to include a conditional submit and PayPal button  (as of 1.9)
 * Author: Alessandro Kaounas @ WPMUDEV
 * Author URI: https://premium.wpmudev.org/
 * License: GPLv2 or later
 */

if ( ! defined( 'ABSPATH' ) ) {
	exit;
}

if ( ! class_exists( 'WPMUDEV_Forminator_PayPal_Submit_Buttons' ) ) {

	class WPMUDEV_Forminator_PayPal_Submit_Buttons {

		private $module_id = 1135;

		private $checkbox = 'checkbox-1';

		private static $_instance = null;

		public static function get_instance() {

			if ( is_null( self::$_instance ) ) {
				self::$_instance = new WPMUDEV_Forminator_PayPal_Submit_Buttons();
			}
			return self::$_instance;

		}

		private function __construct() {

			$this->init();

		}

		private function init() {

			add_filter( 'forminator_render_form_markup', array( $this, 'wpmudev_add_submit_button' ), 10, 6 );
			add_action( 'wp_enqueue_scripts', array( $this, 'wpmudev_theme_prefix_enqueue_script' ) );

		}

		public function wpmudev_add_submit_button( $html, $form_fields, $form_type, $form_settings, $form_design, $render_id ) {

			if ( $form_settings['form_id'] != $this->module_id ) {
				return $html;
			}

			$submit = '<div class="forminator-row"><div class="forminator-col"><div id="submit" class="forminator-field"><button class="forminator-button forminator-button-submit">Send Message</button></div></div></div>';
			$html   = str_replace( '</form>', $submit . '</form>', $html );

			return $html;

		}

		public function wpmudev_theme_prefix_enqueue_script() {

			if ( ! wp_script_is( 'jquery', 'done' ) ) {
				wp_enqueue_script( 'jquery' );
			}

			wp_add_inline_script(
				'jquery',
				"
				jQuery(document).ready(function($){

					function __wpmudev_toogle_paypal_button() {
	
						// Module setup
						var form = $('#forminator-module-' + {$this->module_id});
						var checkbox = form.find('.forminator-row .forminator-field input[name=\"{$this->checkbox}[]\"]');
						
						// Initial values
						var st_button = form.find('.forminator-row .forminator-field .forminator-button-submit');
						
						// If submit button missing, return
						if(!st_button.length) return;
						var pp_button = form.find('.forminator-button-paypal').closest('.forminator-row');
						var btn_status = checkbox.is(':checked');
						// On load
						forminator_{$this->module_id}_toggle_buttons(btn_status, pp_button, st_button);
						
						// Event listener on change
						checkbox.on('change', function(){
							var pp_status = $(this).is(':checked');
							forminator_{$this->module_id}_toggle_buttons(pp_status, pp_button, st_button);
						});
	
					}
	
					
				
					// Function to handle show/hide
					function forminator_{$this->module_id}_toggle_buttons(status, btn_p, btn_s){
						if(status){
							btn_p.show();
							btn_s.hide();
						}else{
							btn_p.hide();
							btn_s.show();
						}
						return;
					}
	
					$(document).ajaxComplete( function( event, xhr, settings ) {
						__wpmudev_toogle_paypal_button();
					});
	
					__wpmudev_toogle_paypal_button();
				
				});"
			);

		}

	}

	if ( ! function_exists( 'WPMUDEV_Forminator_PayPal_Submit_Buttons' ) ) {

		function WPMUDEV_Forminator_PayPal_Submit_Buttons() {
			return WPMUDEV_Forminator_PayPal_Submit_Buttons::get_instance();
		};

		add_action( 'plugins_loaded', 'WPMUDEV_Forminator_PayPal_Submit_Buttons', 99 );

	}
}

where do I write this code?

Hi @1aheed ,
Currently you probably don't need this snippet as Forminator has visibility conditions built in for PayPal button.

To answer your question though, this snippet can be used as a mu-plugin. If you are not familiar with mu-plugins you can read more about them here:
https://premium.wpmudev.org/docs/using-wordpress/installing-wordpress-plugins/#installing-mu-plugins

But as mentioned you don't need this snippet anymore as you can toggle PayPal buttons visibility with built in visibility rules.

Cheers!