wcfm-content-check.php

<?php
/**
 * Plugin Name: WCFM – Content Restriction 2
 * Plugin URI: http://wclovers.com
 * Description: WCFM Messages Content Restriction Customization
 * Author: WC Lovers
 * Version: 2.1.0
 * Author URI: http://wclovers.com
 *
 * Text Domain: wcfm-content-check
 * Domain Path: /lang/
 *
 * WC requires at least: 3.0.0
 * WC tested up to: 3.6.0
 *
 */

if (!defined('ABSPATH')) exit; // Exit if accessed directly

if (!class_exists('WCFM')) return; // Exit if WCFM not installed

add_filter('wcfm_is_allow_enquiry_by_customer', '__return_false');
add_filter('wcfm_is_allow_enquiry_customer_reply', '__return_false');

add_filter('wcfm_enquiry_content', function ($content, $product_id, $vendor_id, $customer_id) {
    if (function_exists('wcfm_filter_content_email_phone')) {
        $new_content = wcfm_filter_content_email_phone($content);
        if($new_content!=$content) {
            return 'predefined text which would include terms and conditions for use of inquiry module';
        }
    }
    return $content;
}, 50, 4);

add_filter('wcfm_enquiry_reply_content', function ($content, $product_id, $vendor_id, $customer_id) {
    if (function_exists('wcfm_filter_content_email_phone')) {
        $new_content = wcfm_filter_content_email_phone($content);
        if($new_content!=$content) {
            return 'predefined text which would include terms and conditions for use of inquiry module';
        }
    }
    return $content;
}, 50, 4);