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<?php |
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/* |
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Plugin Name: Captcha Code |
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Plugin URI: http://www.vinojcardoza.com/captcha-code-authentication/ |
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Description: Adds Captcha Code anti-spam methods to User front-end WordPress forms. |
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Version: 2.7 |
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Author: Vinoj Cardoza |
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Author URI: http://www.vinojcardoza.com |
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License: GPL2 |
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*/ |
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|
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define('WP_CAPTCHA_DIR_URL', plugin_dir_url(__FILE__)); |
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define('WP_CAPTCHA_DIR', dirname(__FILE__)); |
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|
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require 'general_options.php'; |
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|
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/* Hook to initalize the admin menu */ |
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add_action('admin_menu', 'wp_captcha_admin_menu'); |
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/* Hook to initialize sessions */ |
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add_action('init', 'wp_captcha_init_sessions'); |
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|
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/* Hook to store the plugin status */ |
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register_activation_hook(__FILE__, 'wp_captcha_enabled'); |
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register_deactivation_hook(__FILE__, 'wp_captcha_disabled'); |
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|
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function wp_captcha_enabled(){ |
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update_option('wpcaptcha_status', 'enabled'); |
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} |
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function wp_captcha_disabled(){ |
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update_option('wpcaptcha_status', 'disabled'); |
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} |
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|
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/* To add the menus in the admin section */ |
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function wp_captcha_admin_menu(){ |
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add_options_page( |
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__('Captcha settings'), |
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__('Captcha settings'), |
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'manage_options', |
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'wp_captcha_slug', |
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'wp_captcha_general_options'); |
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} |
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|
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function wp_captcha_init_sessions(){ |
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if(!session_id()){ |
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session_start(); |
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} |
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load_plugin_textdomain('wpcaptchadomain', false, dirname( plugin_basename(__FILE__)).'/languages'); |
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$_SESSION['captcha_type'] = get_option('wpcaptcha_type'); |
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$_SESSION['captcha_letters'] = get_option('wpcaptcha_letters'); |
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$_SESSION['total_no_of_characters'] = get_option('wpcaptcha_total_no_of_characters'); |
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if(empty($_SESSION['total_no_of_characters'])){ |
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$_SESSION['total_no_of_characters'] = 6; |
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} |
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} |
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|
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/* Captcha for login authentication starts here */ |
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|
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$login_captcha = get_option('wpcaptcha_login'); |
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if($login_captcha == 'yes'){ |
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add_action('login_form', 'include_wp_captcha_login'); |
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add_filter( 'login_errors', 'include_captcha_login_errors' ); |
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add_filter( 'login_redirect', 'include_captcha_login_redirect', 10, 3 ); |
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} |
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|
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/* Function to include captcha for login form */ |
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function include_wp_captcha_login(){ |
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echo '<p class="login-form-captcha"> |
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<label><b>'. __('Captcha', 'wpcaptchadomain').' </b></label> |
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<span class="required">*</span> |
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<div style="clear:both;"></div> |
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<img alt="code" src="'.WP_CAPTCHA_DIR_URL.'captcha_code_file.php?rand='.rand().'" /> |
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<div style="clear:both;"></div>'; |
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|
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/* Will retrieve the get varibale and prints a message from url if the captcha is wrong */ |
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if(isset($_GET['captcha']) && $_GET['captcha'] == 'confirm_error' ) { |
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echo '<label style="color:#FF0000;" id="capt_err">'.$_SESSION['captcha_error'].'</label><div style="clear:both;"></div>';; |
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$_SESSION['captcha_error'] = ''; |
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} |
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|
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echo '<label>'.__('Type the text displayed above', 'wpcaptchadomain').':</label> |
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<input id="captcha_code" name="captcha_code" size="15" type="text" tabindex="30" /> |
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</p>'; |
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return true; |
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} |
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|
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/* Hook to find out the errors while logging in */ |
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function include_captcha_login_errors($errors){ |
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if( isset( $_REQUEST['action'] ) && 'register' == $_REQUEST['action'] ) |
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return($errors); |
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|
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if($_SESSION['captcha_code'] != $_REQUEST['captcha_code']){ |
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return $errors.'<label id="capt_err" for="captcha_code_error">'.__('Captcha confirmation error!', 'wpcaptchadomain').'</label>'; |
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} |
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return $errors; |
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} |
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|
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/* Hook to redirect after captcha confirmation */ |
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function include_captcha_login_redirect($url){ |
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|
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/* Captcha mismatch */ |
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if(isset($_SESSION['captcha_code']) && isset($_REQUEST['captcha_code']) && $_SESSION['captcha_code'] != $_REQUEST['captcha_code']){ |
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$_SESSION['captcha_error'] = __('Incorrect captcha confirmation!', 'wpcaptchadomain'); |
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wp_clear_auth_cookie(); |
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return $_SERVER["REQUEST_URI"]."/?captcha='confirm_error'"; |
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} |
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/* Captcha match: take to the admin panel */ |
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else{ |
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return home_url('/wp-admin/'); |
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} |
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} |
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|
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/* <!-- Captcha for login authentication ends here --> */ |
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|
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/* Captcha for Comments ends here */ |
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$comment_captcha = get_option('wpcaptcha_comments'); |
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if($comment_captcha == 'yes'){ |
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global $wp_version; |
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if( version_compare($wp_version,'3','>=') ) { // wp 3.0 + |
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add_action( 'comment_form_after_fields', 'include_wp_captcha_comment_form_wp3', 1 ); |
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add_action( 'comment_form_logged_in_after', 'include_wp_captcha_comment_form_wp3', 1 ); |
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} |
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// for WP before WP 3.0 |
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add_action( 'comment_form', 'include_captcha_comment_form' ); |
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add_filter( 'preprocess_comment', 'include_captcha_comment_post' ); |
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} |
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|
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/* Function to include captcha for comments form */ |
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function include_captcha_comment_form(){ |
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$c_registered = get_option('wpcaptcha_registered'); |
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if ( is_user_logged_in() && $c_registered == 'yes') { |
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return true; |
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} |
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echo '<p class="comment-form-captcha"> |
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<label><b>'. __('Captcha', 'wpcaptchadomain').' </b></label> |
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<span class="required">*</span> |
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<div style="clear:both;"></div> |
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<img alt="code" src="'.WP_CAPTCHA_DIR_URL.'captcha_code_file.php?rand='.rand().'" /> |
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<div style="clear:both;"></div> |
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<label>'.__('Type the text displayed above', 'wpcaptchadomain').':</label> |
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<input id="captcha_code" name="captcha_code" size="15" type="text" /> |
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<div style="clear:both;"></div> |
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</p>'; |
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return true; |
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} |
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|
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/* Function to include captcha for comments form > wp3 */ |
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function include_wp_captcha_comment_form_wp3(){ |
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$c_registered = get_option('wpcaptcha_registered'); |
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if ( is_user_logged_in() && $c_registered == 'yes') { |
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return true; |
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} |
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|
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echo '<p class="comment-form-captcha"> |
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<label><b>'. __('Captcha', 'wpcaptchadomain').' </b></label> |
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<span class="required">*</span> |
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<div style="clear:both;"></div> |
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<img alt="code" src="'.WP_CAPTCHA_DIR_URL.'captcha_code_file.php?rand='.rand().'" /> |
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<div style="clear:both;"></div> |
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<label>'.__('Type the text displayed above', 'wpcaptchadomain').':</label> |
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<input id="captcha_code" name="captcha_code" size="15" type="text" /> |
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<div style="clear:both;"></div> |
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</p>'; |
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|
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remove_action( 'comment_form', 'include_captcha_comment_form' ); |
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|
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return true; |
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} |
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|
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// this function checks captcha posted with the comment |
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function include_captcha_comment_post($comment) { |
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$c_registered = get_option('wpcaptcha_registered'); |
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if (is_user_logged_in() && $c_registered == 'yes') { |
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return $comment; |
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} |
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|
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// skip captcha for comment replies from the admin menu |
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if ( isset( $_REQUEST['action'] ) && $_REQUEST['action'] == 'replyto-comment' && |
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( check_ajax_referer( 'replyto-comment', '_ajax_nonce', false ) || check_ajax_referer( 'replyto-comment', '_ajax_nonce-replyto-comment', false ) ) ) { |
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// skip capthca |
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return $comment; |
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} |
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|
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// Skip captcha for trackback or pingback |
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if ( $comment['comment_type'] != '' && $comment['comment_type'] != 'comment' ) { |
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// skip captcha |
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return $comment; |
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} |
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|
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// If captcha is empty |
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if(empty($_REQUEST['captcha_code'])) |
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wp_die( __('CAPTCHA cannot be empty.', 'wpcaptchadomain' ) ); |
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|
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// captcha was matched |
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if($_SESSION['captcha_code'] == $_REQUEST['captcha_code']) return($comment); |
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else wp_die( __('Error: Incorrect CAPTCHA. Press your browser\'s back button and try again.', 'wpcaptchadomain')); |
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} |
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|
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/* <!-- Captcha for Comments authentication ends here --> */ |
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|
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// Add captcha in the register form |
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$register_captcha = get_option('wpcaptcha_register'); |
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if($register_captcha == 'yes'){ |
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add_action('register_form', 'include_wp_captcha_register'); |
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add_action( 'register_post', 'include_captcha_register_post', 10, 3 ); |
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add_action( 'signup_extra_fields', 'include_wp_captcha_register' ); |
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add_filter( 'wpmu_validate_user_signup', 'include_captcha_register_validate' ); |
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} |
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|
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/* Function to include captcha for register form */ |
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function include_wp_captcha_register($default){ |
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echo '<p class="register-form-captcha"> |
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<label><b>'. __('Captcha', 'wpcaptchadomain').' </b></label> |
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<span class="required">*</span> |
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<div style="clear:both;"></div> |
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<img alt="code" src="'.WP_CAPTCHA_DIR_URL.'captcha_code_file.php?rand='.rand().'" /> |
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<div style="clear:both;"></div> |
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<label>'.__('Type the text displayed above', 'wpcaptchadomain').':</label> |
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<input id="captcha_code" name="captcha_code" size="15" type="text" /> |
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</p>'; |
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return true; |
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} |
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|
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/* This function checks captcha posted with registration */ |
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function include_captcha_register_post($login,$email,$errors) { |
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|
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// If captcha is blank - add error |
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if ( isset( $_REQUEST['captcha_code'] ) && "" == $_REQUEST['captcha_code'] ) { |
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$errors->add('captcha_blank', '<strong>'.__('ERROR', 'wpcaptchadomain').'</strong>: '.__('Please complete the CAPTCHA.', 'wpcaptchadomain')); |
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return $errors; |
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} |
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|
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if ( isset( $_REQUEST['captcha_code'] ) && ($_SESSION['captcha_code'] == $_REQUEST['captcha_code'] )) { |
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// captcha was matched |
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} else { |
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$errors->add('captcha_wrong', '<strong>'.__('ERROR', 'wpcaptchadomain').'</strong>: '.__('That CAPTCHA was incorrect.', 'wpcaptchadomain')); |
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} |
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return($errors); |
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} |
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/* End of the function include_captcha_register_post */ |
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|
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function include_captcha_register_validate($results) { |
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if ( isset( $_REQUEST['captcha_code'] ) && "" == $_REQUEST['captcha_code'] ) { |
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$results['errors']->add('captcha_blank', '<strong>'.__('ERROR', 'wpcaptchadomain').'</strong>: '.__('Please complete the CAPTCHA.', 'wpcaptchadomain')); |
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return $results; |
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} |
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|
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if ( isset( $_REQUEST['captcha_code'] ) && ($_SESSION['captcha_code'] == $_REQUEST['captcha_code'] )) { |
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// captcha was matched |
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} else { |
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$results['errors']->add('captcha_wrong', '<strong>'.__('ERROR', 'wpcaptchadomain').'</strong>: '.__('That CAPTCHA was incorrect.', 'wpcaptchadomain')); |
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} |
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return($results); |
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} |
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/* End of the function include_captcha_register_validate */ |
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|
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$lost_captcha = get_option('wpcaptcha_lost'); |
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// Add captcha into lost password form |
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if($lost_captcha == 'yes'){ |
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add_action( 'lostpassword_form', 'include_wp_captcha_lostpassword' ); |
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add_action( 'lostpassword_post', 'include_wp_captcha_lostpassword_post', 10, 3 ); |
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} |
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|
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/* Function to include captcha for lost password form */ |
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function include_wp_captcha_lostpassword($default){ |
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echo '<p class="lost-form-captcha"> |
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<label><b>'. __('Captcha', 'wpcaptchadomain').' </b></label> |
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<span class="required">*</span> |
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<div style="clear:both;"></div> |
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<img alt="code" src="'.WP_CAPTCHA_DIR_URL.'captcha_code_file.php?rand='.rand().'" /> |
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<div style="clear:both;"></div> |
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<label>'.__('Type the text displayed above', 'wpcaptchadomain').':</label> |
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<input id="captcha_code" name="captcha_code" size="15" type="text" /> |
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</p>'; |
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} |
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|
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function include_wp_captcha_lostpassword_post() { |
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if( isset( $_REQUEST['user_login'] ) && "" == $_REQUEST['user_login'] ) |
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return; |
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|
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// If captcha doesn't entered |
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if ( isset( $_REQUEST['captcha_code'] ) && "" == $_REQUEST['captcha_code'] ) { |
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wp_die( __( 'Please complete the CAPTCHA.', 'wpcaptchadomain' ) ); |
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} |
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|
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// Check entered captcha |
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if ( isset( $_REQUEST['captcha_code'] ) && ($_SESSION['captcha_code'] == $_REQUEST['captcha_code'] )) { |
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return; |
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} else { |
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wp_die( __( 'Error: Incorrect CAPTCHA. Press your browser\'s back button and try again.', 'wpcaptchadomain' ) ); |
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} |
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} |
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?> |
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|
