How to fix “An active PHP session was detected” error message.

I solved this problem myself. To fix the problem, do the following:

This coding is for version 2.7.

Open the plugin’s wpCaptcha.php page and delete all the codes, add the codes below to the page and save.

<?php
/*
Plugin Name: Captcha Code
Plugin URI: https://www.vinojcardoza.com/captcha-code-authentication/
Description: Adds Captcha Code anti-spam methods to User front-end WordPress forms.
Version: 2.7
Author: Vinoj Cardoza
Author URI: https://www.vinojcardoza.com
License: GPL2
*/

define(‘WP_CAPTCHA_DIR_URL’, plugin_dir_url(__FILE__));
define(‘WP_CAPTCHA_DIR’, dirname(__FILE__));

require ‘general_options.php’;

/* Hook to initalize the admin menu */
add_action(‘admin_menu’, ‘wp_captcha_admin_menu’);
/* Hook to initialize sessions */
add_action(‘init’, ‘wp_captcha_init_sessions’);

/* Hook to store the plugin status */
register_activation_hook(__FILE__, ‘wp_captcha_enabled’);
register_deactivation_hook(__FILE__, ‘wp_captcha_disabled’);

function wp_captcha_enabled(){
update_option(‘wpcaptcha_status’, ‘enabled’);
}
function wp_captcha_disabled(){
update_option(‘wpcaptcha_status’, ‘disabled’);
}

/* To add the menus in the admin section */
function wp_captcha_admin_menu(){
add_options_page(
__(‘Captcha settings’),
__(‘Captcha settings’),
‘manage_options’,
‘wp_captcha_slug’,
‘wp_captcha_general_options’);
}

function wp_captcha_init_sessions(){
if(!session_id()){
session_start();
}
load_plugin_textdomain(‘wpcaptchadomain’, false, dirname( plugin_basename(__FILE__)).’/languages’);
$_SESSION[‘captcha_type’] = get_option(‘wpcaptcha_type’);
$_SESSION[‘captcha_letters’] = get_option(‘wpcaptcha_letters’);
$_SESSION[‘total_no_of_characters’] = get_option(‘wpcaptcha_total_no_of_characters’);
if(empty($_SESSION[‘total_no_of_characters’])){
$_SESSION[‘total_no_of_characters’] = 6;
}
session_write_close();
}

/* Captcha for login authentication starts here */

$login_captcha = get_option(‘wpcaptcha_login’);
if($login_captcha == ‘yes’){
add_action(‘login_form’, ‘include_wp_captcha_login’);
add_filter( ‘login_errors’, ‘include_captcha_login_errors’ );
add_filter( ‘login_redirect’, ‘include_captcha_login_redirect’, 10, 3 );
}

/* Function to include captcha for login form */
function include_wp_captcha_login(){
echo ‘<p class=”login-form-captcha”>
<label><b>’. __(‘Captcha’, ‘wpcaptchadomain’).’ </b></label>
<span class=”required”>*</span>
<div style=”clear:both;”></div>

<div style=”clear:both;”></div>’;

/* Will retrieve the get varibale and prints a message from url if the captcha is wrong */
if(isset($_GET[‘captcha’]) && $_GET[‘captcha’] == ‘confirm_error’ ) {
echo ‘<label style=”color:#FF0000;” id=”capt_err”>’.$_SESSION[‘captcha_error’].'</label><div style=”clear:both;”></div>’;;
$_SESSION[‘captcha_error’] = ”;
}

echo ‘<label>’.__(‘Type the text displayed above’, ‘wpcaptchadomain’).’:</label>
<input id=”captcha_code” name=”captcha_code” size=”15″ type=”text” tabindex=”30″ />
</p>’;
return true;
}

/* Hook to find out the errors while logging in */
function include_captcha_login_errors($errors){
if( isset( $_REQUEST[‘action’] ) && ‘register’ == $_REQUEST[‘action’] )
return($errors);

if($_SESSION[‘captcha_code’] != $_REQUEST[‘captcha_code’]){
return $errors.'<label id=”capt_err” for=”captcha_code_error”>’.__(‘Captcha confirmation error!’, ‘wpcaptchadomain’).'</label>’;
}
return $errors;
}

/* Hook to redirect after captcha confirmation */
function include_captcha_login_redirect($url){

/* Captcha mismatch */
if(isset($_SESSION[‘captcha_code’]) && isset($_REQUEST[‘captcha_code’]) && $_SESSION[‘captcha_code’] != $_REQUEST[‘captcha_code’]){
$_SESSION[‘captcha_error’] = __(‘Incorrect captcha confirmation!’, ‘wpcaptchadomain’);
wp_clear_auth_cookie();
return $_SERVER[“REQUEST_URI”].”/?captcha=’confirm_error'”;
}
/* Captcha match: take to the admin panel */
else{
return home_url(‘/wp-admin/’);
}
}

/* <!– Captcha for login authentication ends here –> */

/* Captcha for Comments ends here */
$comment_captcha = get_option(‘wpcaptcha_comments’);
if($comment_captcha == ‘yes’){
global $wp_version;
if( version_compare($wp_version,’3′,’>=’) ) { // wp 3.0 +
add_action( ‘comment_form_after_fields’, ‘include_wp_captcha_comment_form_wp3’, 1 );
add_action( ‘comment_form_logged_in_after’, ‘include_wp_captcha_comment_form_wp3’, 1 );
}
// for WP before WP 3.0
add_action( ‘comment_form’, ‘include_captcha_comment_form’ );
add_filter( ‘preprocess_comment’, ‘include_captcha_comment_post’ );
}

/* Function to include captcha for comments form */
function include_captcha_comment_form(){
$c_registered = get_option(‘wpcaptcha_registered’);
if ( is_user_logged_in() && $c_registered == ‘yes’) {
return true;
}
echo ‘<p class=”comment-form-captcha”>
<label><b>’. __(‘Captcha’, ‘wpcaptchadomain’).’ </b></label>
<span class=”required”>*</span>
<div style=”clear:both;”></div>

<div style=”clear:both;”></div>
<label>’.__(‘Type the text displayed above’, ‘wpcaptchadomain’).’:</label>
<input id=”captcha_code” name=”captcha_code” size=”15″ type=”text” />
<div style=”clear:both;”></div>
</p>’;
return true;
}

/* Function to include captcha for comments form > wp3 */
function include_wp_captcha_comment_form_wp3(){
$c_registered = get_option(‘wpcaptcha_registered’);
if ( is_user_logged_in() && $c_registered == ‘yes’) {
return true;
}

echo ‘<p class=”comment-form-captcha”>
<label><b>’. __(‘Captcha’, ‘wpcaptchadomain’).’ </b></label>
<span class=”required”>*</span>
<div style=”clear:both;”></div>

<div style=”clear:both;”></div>
<label>’.__(‘Type the text displayed above’, ‘wpcaptchadomain’).’:</label>
<input id=”captcha_code” name=”captcha_code” size=”15″ type=”text” />
<div style=”clear:both;”></div>
</p>’;

remove_action( ‘comment_form’, ‘include_captcha_comment_form’ );

return true;
}

// this function checks captcha posted with the comment
function include_captcha_comment_post($comment) {
$c_registered = get_option(‘wpcaptcha_registered’);
if (is_user_logged_in() && $c_registered == ‘yes’) {
return $comment;
}

// skip captcha for comment replies from the admin menu
if ( isset( $_REQUEST[‘action’] ) && $_REQUEST[‘action’] == ‘replyto-comment’ &&
( check_ajax_referer( ‘replyto-comment’, ‘_ajax_nonce’, false ) || check_ajax_referer( ‘replyto-comment’, ‘_ajax_nonce-replyto-comment’, false ) ) ) {
// skip capthca
return $comment;
}

// Skip captcha for trackback or pingback
if ( $comment[‘comment_type’] != ” && $comment[‘comment_type’] != ‘comment’ ) {
// skip captcha
return $comment;
}

// If captcha is empty
if(empty($_REQUEST[‘captcha_code’]))
wp_die( __(‘CAPTCHA cannot be empty.’, ‘wpcaptchadomain’ ) );

// captcha was matched
if($_SESSION[‘captcha_code’] == $_REQUEST[‘captcha_code’]) return($comment);
else wp_die( __(‘Error: Incorrect CAPTCHA. Press your browser\’s back button and try again.’, ‘wpcaptchadomain’));
}

/* <!– Captcha for Comments authentication ends here –> */

// Add captcha in the register form
$register_captcha = get_option(‘wpcaptcha_register’);
if($register_captcha == ‘yes’){
add_action(‘register_form’, ‘include_wp_captcha_register’);
add_action( ‘register_post’, ‘include_captcha_register_post’, 10, 3 );
add_action( ‘signup_extra_fields’, ‘include_wp_captcha_register’ );
add_filter( ‘wpmu_validate_user_signup’, ‘include_captcha_register_validate’ );
}

/* Function to include captcha for register form */
function include_wp_captcha_register($default){
echo ‘<p class=”register-form-captcha”>
<label><b>’. __(‘Captcha’, ‘wpcaptchadomain’).’ </b></label>
<span class=”required”>*</span>
<div style=”clear:both;”></div>

<div style=”clear:both;”></div>
<label>’.__(‘Type the text displayed above’, ‘wpcaptchadomain’).’:</label>
<input id=”captcha_code” name=”captcha_code” size=”15″ type=”text” />
</p>’;
return true;
}

/* This function checks captcha posted with registration */
function include_captcha_register_post($login,$email,$errors) {

// If captcha is blank – add error
if ( isset( $_REQUEST[‘captcha_code’] ) && “” == $_REQUEST[‘captcha_code’] ) {
$errors->add(‘captcha_blank’, ‘‘.__(‘ERROR’, ‘wpcaptchadomain’).’: ‘.__(‘Please complete the CAPTCHA.’, ‘wpcaptchadomain’));
return $errors;
}

if ( isset( $_REQUEST[‘captcha_code’] ) && ($_SESSION[‘captcha_code’] == $_REQUEST[‘captcha_code’] )) {
// captcha was matched
} else {
$errors->add(‘captcha_wrong’, ‘‘.__(‘ERROR’, ‘wpcaptchadomain’).’: ‘.__(‘That CAPTCHA was incorrect.’, ‘wpcaptchadomain’));
}
return($errors);
}
/* End of the function include_captcha_register_post */

function include_captcha_register_validate($results) {
if ( isset( $_REQUEST[‘captcha_code’] ) && “” == $_REQUEST[‘captcha_code’] ) {
$results[‘errors’]->add(‘captcha_blank’, ‘‘.__(‘ERROR’, ‘wpcaptchadomain’).’: ‘.__(‘Please complete the CAPTCHA.’, ‘wpcaptchadomain’));
return $results;
}

if ( isset( $_REQUEST[‘captcha_code’] ) && ($_SESSION[‘captcha_code’] == $_REQUEST[‘captcha_code’] )) {
// captcha was matched
} else {
$results[‘errors’]->add(‘captcha_wrong’, ‘‘.__(‘ERROR’, ‘wpcaptchadomain’).’: ‘.__(‘That CAPTCHA was incorrect.’, ‘wpcaptchadomain’));
}
return($results);
}
/* End of the function include_captcha_register_validate */

$lost_captcha = get_option(‘wpcaptcha_lost’);
// Add captcha into lost password form
if($lost_captcha == ‘yes’){
add_action( ‘lostpassword_form’, ‘include_wp_captcha_lostpassword’ );
add_action( ‘lostpassword_post’, ‘include_wp_captcha_lostpassword_post’, 10, 3 );
}

/* Function to include captcha for lost password form */
function include_wp_captcha_lostpassword($default){
echo ‘<p class=”lost-form-captcha”>
<label><b>’. __(‘Captcha’, ‘wpcaptchadomain’).’ </b></label>
<span class=”required”>*</span>
<div style=”clear:both;”></div>

<div style=”clear:both;”></div>
<label>’.__(‘Type the text displayed above’, ‘wpcaptchadomain’).’:</label>
<input id=”captcha_code” name=”captcha_code” size=”15″ type=”text” />
</p>’;
}

function include_wp_captcha_lostpassword_post() {
if( isset( $_REQUEST[‘user_login’] ) && “” == $_REQUEST[‘user_login’] )
return;

// If captcha doesn’t entered
if ( isset( $_REQUEST[‘captcha_code’] ) && “” == $_REQUEST[‘captcha_code’] ) {
wp_die( __( ‘Please complete the CAPTCHA.’, ‘wpcaptchadomain’ ) );
}

// Check entered captcha
if ( isset( $_REQUEST[‘captcha_code’] ) && ($_SESSION[‘captcha_code’] == $_REQUEST[‘captcha_code’] )) {
return;
} else {
wp_die( __( ‘Error: Incorrect CAPTCHA. Press your browser\’s back button and try again.’, ‘wpcaptchadomain’ ) );
}
}
?>

Add the bold text in the above code (session_write_close();) and save the page. If you don’t understand the above explanation,… Add the code after line 53 and save the page.

Same error here. Thanks a lot for your fix! ??