Ticket #18819: wp-comments-post.php

<?php
/**
 * Handles Comment Post to WordPress and prevents duplicate comment posting.
 *
 * @package WordPress
 */

if ( 'POST' != $_SERVER['REQUEST_METHOD'] ) {
        header('Allow: POST');
        header('HTTP/1.1 405 Method Not Allowed');
        header('Content-Type: text/plain');
        exit;
}

/** Sets up the WordPress Environment. */
require( dirname(__FILE__) . '/wp-load.php' );

nocache_headers();

$comment_post_ID = isset($_POST['comment_post_ID']) ? (int) $_POST['comment_post_ID'] : 0;

$post = get_post($comment_post_ID);

if ( empty($post->comment_status) ) {
        do_action('comment_id_not_found', $comment_post_ID);
        exit;
}

// get_post_status() will get the parent status for attachments.
$status = get_post_status($post);

$status_obj = get_post_status_object($status);

if ( !comments_open($comment_post_ID) ) {
        do_action('comment_closed', $comment_post_ID);
        wp_die( __('Sorry, comments are closed for this item.') );
} elseif ( 'trash' == $status ) {
        do_action('comment_on_trash', $comment_post_ID);
        exit;
} elseif ( !$status_obj->public && !$status_obj->private ) {
        do_action('comment_on_draft', $comment_post_ID);
        exit;
} elseif ( post_password_required($comment_post_ID) ) {
        do_action('comment_on_password_protected', $comment_post_ID);
        exit;
} else {
        do_action('pre_comment_on_post', $comment_post_ID);
}

$comment_author       = ( isset($_POST['author']) )  ? trim(strip_tags($_POST['author'])) : null;
$comment_author_email = ( isset($_POST['email']) )   ? trim($_POST['email']) : null;
$comment_author_url   = ( isset($_POST['url']) )     ? trim($_POST['url']) : null;
$comment_content      = ( isset($_POST['comment']) ) ? trim($_POST['comment']) : null;

// If the user is logged in
$user = wp_get_current_user();
if ( $user->ID ) {
        if ( empty( $user->display_name ) )
                $user->display_name=$user->user_login;
        $comment_author       = $wpdb->escape($user->display_name);
        $comment_author_email = $wpdb->escape($user->user_email);
        $comment_author_url   = $wpdb->escape($user->user_url);
        if ( current_user_can('unfiltered_html') ) {
                if ( wp_create_nonce('unfiltered-html-comment_' . $comment_post_ID) != $_POST['_wp_unfiltered_html_comment'] ) {
                        kses_remove_filters(); // start with a clean slate
                        kses_init_filters(); // set up the filters
                }
        }
} else {
        if ( get_option('comment_registration') || 'private' == $status )
                wp_die( __('Sorry, you must be logged in to post a comment.') );
}

$comment_type = '';

if ( get_option('require_name_email') && !$user->ID ) {
        if ( 6 > strlen($comment_author_email) || '' == $comment_author )
                wp_die( __('Error: please fill the required fields (name, email).') );
        elseif ( !is_email($comment_author_email))
                wp_die( __('Error: please enter a valid email address.') );
}

if ( '' == $comment_content )
        wp_die( __('Error: please type a comment.') );

$comment_parent = isset($_POST['comment_parent']) ? absint($_POST['comment_parent']) : 0;

$commentdata = compact('comment_post_ID', 'comment_author', 'comment_author_email', 'comment_author_url', 'comment_content', 'comment_type', 'comment_parent', 'user_ID');

$comment_id = wp_new_comment( $commentdata );

$comment = get_comment($comment_id);
if ( (!defined('BLOCK_COMMENTER_COOKIES')) || (!BLOCK_COMMENTER_COOKIES) ) {
        if ( !$user->ID ) {
                $comment_cookie_lifetime = apply_filters('comment_cookie_lifetime', 30000000);
                setcookie('comment_author_' . COOKIEHASH, $comment->comment_author, time() + $comment_cookie_lifetime, COOKIEPATH, COOKIE_DOMAIN);
                setcookie('comment_author_email_' . COOKIEHASH, $comment->comment_author_email, time() + $comment_cookie_lifetime, COOKIEPATH, COOKIE_DOMAIN);
                setcookie('comment_author_url_' . COOKIEHASH, esc_url($comment->comment_author_url), time() + $comment_cookie_lifetime, COOKIEPATH, COOKIE_DOMAIN);
        }
}

$location = empty($_POST['redirect_to']) ? get_comment_link($comment_id) : $_POST['redirect_to'] . '#comment-' . $comment_id;
$location = apply_filters('comment_post_redirect', $location, $comment);

wp_redirect($location);
exit;
?>