[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';
			foreach( $field_data_array as $key => $value ) {
				if( isset ( $value[ 'form_field_obj' ] ) ) {
					unset( $field_data_array[ $key ][ 'form_field_obj' ] );
				}
			}
			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 );
	}
}

Thanks for the snippet, but I think i've found a limitation or issue here as banned words that are part of acceptable words would also cause the "Banned words" submit error. E.g if the word compass was to be used. It contains a banned word. Is there anyway it could be updated to not include these part of word issue? Also having a way to debug to see what banned word was hit would be good. Thanks