[Forminator] - Banned words

bannedwords.csv.zip

forminator-banned-words.php

<?php
/**
 * Plugin Name: [Forminator] - Banned words
 * Plugin URI: https://premium.wpmudev.org/
 * Description: Banned words check for Forminator.
 * Author: Panos Lyrakis @ WPMUDEV
 * Author URI: https://premium.wpmudev.org/
 * Task: SLS-2801
 * License: GPLv2 or later
 */

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

if ( defined( 'WP_CLI' ) && WP_CLI ) {
	return;
}

if ( ! class_exists( 'WPMUDEV_Forminator_Banned_Words' ) ) {

	class WPMUDEV_Forminator_Banned_Words {

		private $error_message = 'There were some banned words found in your submission';

		private static $_instance = null;

		private $filter_error_message = false;

		public static function get_instance() {

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

		}

		private function __construct() {
			add_filter( 'forminator_custom_form_submit_errors', array( $this, 'control_words' ), 10, 3 );
			add_filter( 'forminator_custom_form_invalid_form_message', array( $this, 'filter_error_message' ) );
		}

		public function control_words( $submit_errors, $form_id, $field_data_array ) {
			$csv_file = WP_CONTENT_DIR . '/mu-plugins/bannedwords.csv';

			if ( file_exists( $csv_file ) && is_readable( $csv_file ) ) {
				$fields_words = implode(
					' ',
					array_map(
						function( $a ) {
							return implode( ' ', $a );
						},
						$field_data_array
					)
				);

				$banned_words = array_map(
					function( $csv ) {
						return $csv[0];
					},
					array_map( 'str_getcsv', file( $csv_file ) )
				);

				$banned_words = implode( '|', $banned_words );
				$banned_words = preg_replace( '/[^\w_|]+/u', '', $banned_words );

				$matches     = array();
				$match_found = preg_match(
					'(' . $banned_words . ')',
					$fields_words,
					$matches
				);

				if ( $match_found && ! empty( $matches ) ) {
					// We need somehting here so that the `$submit_errors` array is not empty.
					$submit_errors[]            = array( $matches );
					$this->filter_error_message = true;
				}
			}

			return $submit_errors;
		}

		public function filter_error_message( $invalid_form_message ) {
			if ( $this->filter_error_message ) {
				$invalid_form_message = __( $this->error_message );
			}

			return $invalid_form_message;
		}

	}

	if ( ! function_exists( 'wpmudev_forminator_banned_words' ) ) {

		function wpmudev_forminator_banned_words() {
			return WPMUDEV_Forminator_Banned_Words::get_instance();
		};

		add_action( 'plugins_loaded', 'wpmudev_forminator_banned_words', 10 );
	}
}

I just tried uploading both of these files to the wp-content/mu-plugins/ directory on a few different Wordpress sites, and I thought it was working, but it was stopping all form submissions and spitting back this error, "An error occurred while processing the form. Please try again".