WordPress Version: 6.5
/**
* Canonical API to handle WordPress Redirecting
*
* Based on "Permalink Redirect" from Scott Yang and "Enforce www. Preference"
* by Mark Jaquith
*
* @package WordPress
* @since 2.3.0
*/
/**
* Redirects incoming links to the proper URL based on the site url.
*
* Search engines consider www.somedomain.com and somedomain.com to be two
* different URLs when they both go to the same location. This SEO enhancement
* prevents penalty for duplicate content by redirecting all incoming links to
* one or the other.
*
* Prevents redirection for feeds, trackbacks, searches, and
* admin URLs. Does not redirect on non-pretty-permalink-supporting IIS 7+,
* page/post previews, WP admin, Trackbacks, robots.txt, favicon.ico, searches,
* or on POST requests.
*
* Will also attempt to find the correct link when a user enters a URL that does
* not exist based on exact WordPress query. Will instead try to parse the URL
* or query in an attempt to figure the correct page to go to.
*
* @since 2.3.0
*
* @global WP_Rewrite $wp_rewrite WordPress rewrite component.
* @global bool $is_IIS
* @global WP_Query $wp_query WordPress Query object.
* @global wpdb $wpdb WordPress database abstraction object.
* @global WP $wp Current WordPress environment instance.
*
* @param string $requested_url Optional. The URL that was requested, used to
* figure if redirect is needed.
* @param bool $do_redirect Optional. Redirect to the new URL.
* @return string|void The string of the URL, if redirect needed.
*/
function redirect_canonical($requested_url = null, $do_redirect = true)
{
global $wp_rewrite, $is_IIS, $wp_query, $wpdb, $wp;
if (isset($_SERVER['REQUEST_METHOD']) && !in_array(strtoupper($_SERVER['REQUEST_METHOD']), array('GET', 'HEAD'), true)) {
return;
}
/*
* If we're not in wp-admin and the post has been published and preview nonce
* is non-existent or invalid then no need for preview in query.
*/
if (is_preview() && get_query_var('p') && 'publish' === get_post_status(get_query_var('p'))) {
if (!isset($_GET['preview_id']) || !isset($_GET['preview_nonce']) || !wp_verify_nonce($_GET['preview_nonce'], 'post_preview_' . (int) $_GET['preview_id'])) {
$wp_query->is_preview = false;
}
}
if (is_admin() || is_search() || is_preview() || is_trackback() || is_favicon() || $is_IIS && !iis7_supports_permalinks()) {
return;
}
if (!$requested_url && isset($_SERVER['HTTP_HOST'])) {
// Build the URL in the address bar.
$requested_url = is_ssl() ? 'https://' : 'http://';
$requested_url .= $_SERVER['HTTP_HOST'];
$requested_url .= $_SERVER['REQUEST_URI'];
}
$original = parse_url($requested_url);
if (false === $original) {
return;
}
$redirect = $original;
$redirect_url = false;
$redirect_obj = false;
// Notice fixing.
if (!isset($redirect['path'])) {
$redirect['path'] = '';
}
if (!isset($redirect['query'])) {
$redirect['query'] = '';
}
/*
* If the original URL ended with non-breaking spaces, they were almost
* certainly inserted by accident. Let's remove them, so the reader doesn't
* see a 404 error with no obvious cause.
*/
$redirect['path'] = preg_replace('|(%C2%A0)+$|i', '', $redirect['path']);
// It's not a preview, so remove it from URL.
if (get_query_var('preview')) {
$redirect['query'] = remove_query_arg('preview', $redirect['query']);
}
$post_id = get_query_var('p');
if (is_feed() && $post_id) {
$redirect_url = get_post_comments_feed_link($post_id, get_query_var('feed'));
$redirect_obj = get_post($post_id);
if ($redirect_url) {
$redirect['query'] = _remove_qs_args_if_not_in_url($redirect['query'], array('p', 'page_id', 'attachment_id', 'pagename', 'name', 'post_type', 'feed'), $redirect_url);
$redirect['path'] = parse_url($redirect_url, PHP_URL_PATH);
}
}
if (is_singular() && $wp_query->post_count < 1 && $post_id) {
$vars = $wpdb->get_results($wpdb->prepare("SELECT post_type, post_parent FROM {$wpdb->posts} WHERE ID = %d", $post_id));
if (!empty($vars[0])) {
$vars = $vars[0];
if ('revision' === $vars->post_type && $vars->post_parent > 0) {
$post_id = $vars->post_parent;
}
$redirect_url = get_permalink($post_id);
$redirect_obj = get_post($post_id);
if ($redirect_url) {
$redirect['query'] = _remove_qs_args_if_not_in_url($redirect['query'], array('p', 'page_id', 'attachment_id', 'pagename', 'name', 'post_type'), $redirect_url);
}
}
}
// These tests give us a WP-generated permalink.
if (is_404()) {
// Redirect ?page_id, ?p=, ?attachment_id= to their respective URLs.
$post_id = max(get_query_var('p'), get_query_var('page_id'), get_query_var('attachment_id'));
$redirect_post = $post_id ? get_post($post_id) : false;
if ($redirect_post) {
$post_type_obj = get_post_type_object($redirect_post->post_type);
if ($post_type_obj && $post_type_obj->public && 'auto-draft' !== $redirect_post->post_status) {
$redirect_url = get_permalink($redirect_post);
$redirect_obj = get_post($redirect_post);
$redirect['query'] = _remove_qs_args_if_not_in_url($redirect['query'], array('p', 'page_id', 'attachment_id', 'pagename', 'name', 'post_type'), $redirect_url);
}
}
$year = get_query_var('year');
$month = get_query_var('monthnum');
$day = get_query_var('day');
if ($year && $month && $day) {
$date = sprintf('%04d-%02d-%02d', $year, $month, $day);
if (!wp_checkdate($month, $day, $year, $date)) {
$redirect_url = get_month_link($year, $month);
$redirect['query'] = _remove_qs_args_if_not_in_url($redirect['query'], array('year', 'monthnum', 'day'), $redirect_url);
}
} elseif ($year && $month && $month > 12) {
$redirect_url = get_year_link($year);
$redirect['query'] = _remove_qs_args_if_not_in_url($redirect['query'], array('year', 'monthnum'), $redirect_url);
}
// Strip off non-existing <!--nextpage--> links from single posts or pages.
if (get_query_var('page')) {
$post_id = 0;
if ($wp_query->queried_object instanceof WP_Post) {
$post_id = $wp_query->queried_object->ID;
} elseif ($wp_query->post) {
$post_id = $wp_query->post->ID;
}
if ($post_id) {
$redirect_url = get_permalink($post_id);
$redirect_obj = get_post($post_id);
$redirect['path'] = rtrim($redirect['path'], (int) get_query_var('page') . '/');
$redirect['query'] = remove_query_arg('page', $redirect['query']);
}
}
if (!$redirect_url) {
$redirect_url = redirect_guess_404_permalink();
if ($redirect_url) {
$redirect['query'] = _remove_qs_args_if_not_in_url($redirect['query'], array('page', 'feed', 'p', 'page_id', 'attachment_id', 'pagename', 'name', 'post_type'), $redirect_url);
}
}
} elseif (is_object($wp_rewrite) && $wp_rewrite->using_permalinks()) {
// Rewriting of old ?p=X, ?m=2004, ?m=200401, ?m=20040101.
if (is_attachment() && !array_diff(array_keys($wp->query_vars), array('attachment', 'attachment_id')) && !$redirect_url) {
if (!empty($_GET['attachment_id'])) {
$redirect_url = get_attachment_link(get_query_var('attachment_id'));
$redirect_obj = get_post(get_query_var('attachment_id'));
if ($redirect_url) {
$redirect['query'] = remove_query_arg('attachment_id', $redirect['query']);
}
} else {
$redirect_url = get_attachment_link();
$redirect_obj = get_post();
}
} elseif (is_single() && !empty($_GET['p']) && !$redirect_url) {
$redirect_url = get_permalink(get_query_var('p'));
$redirect_obj = get_post(get_query_var('p'));
if ($redirect_url) {
$redirect['query'] = remove_query_arg(array('p', 'post_type'), $redirect['query']);
}
} elseif (is_single() && !empty($_GET['name']) && !$redirect_url) {
$redirect_url = get_permalink($wp_query->get_queried_object_id());
$redirect_obj = get_post($wp_query->get_queried_object_id());
if ($redirect_url) {
$redirect['query'] = remove_query_arg('name', $redirect['query']);
}
} elseif (is_page() && !empty($_GET['page_id']) && !$redirect_url) {
$redirect_url = get_permalink(get_query_var('page_id'));
$redirect_obj = get_post(get_query_var('page_id'));
if ($redirect_url) {
$redirect['query'] = remove_query_arg('page_id', $redirect['query']);
}
} elseif (is_page() && !is_feed() && !$redirect_url && 'page' === get_option('show_on_front') && get_queried_object_id() === (int) get_option('page_on_front')) {
$redirect_url = home_url('/');
} elseif (is_home() && !empty($_GET['page_id']) && !$redirect_url && 'page' === get_option('show_on_front') && get_query_var('page_id') === (int) get_option('page_for_posts')) {
$redirect_url = get_permalink(get_option('page_for_posts'));
$redirect_obj = get_post(get_option('page_for_posts'));
if ($redirect_url) {
$redirect['query'] = remove_query_arg('page_id', $redirect['query']);
}
} elseif (!empty($_GET['m']) && (is_year() || is_month() || is_day())) {
$m = get_query_var('m');
switch (strlen($m)) {
case 4:
// Yearly.
$redirect_url = get_year_link($m);
break;
case 6:
// Monthly.
$redirect_url = get_month_link(substr($m, 0, 4), substr($m, 4, 2));
break;
case 8:
// Daily.
$redirect_url = get_day_link(substr($m, 0, 4), substr($m, 4, 2), substr($m, 6, 2));
break;
}
if ($redirect_url) {
$redirect['query'] = remove_query_arg('m', $redirect['query']);
}
// Now moving on to non ?m=X year/month/day links.
} elseif (is_date()) {
$year = get_query_var('year');
$month = get_query_var('monthnum');
$day = get_query_var('day');
if (is_day() && $year && $month && !empty($_GET['day'])) {
$redirect_url = get_day_link($year, $month, $day);
if ($redirect_url) {
$redirect['query'] = remove_query_arg(array('year', 'monthnum', 'day'), $redirect['query']);
}
} elseif (is_month() && $year && !empty($_GET['monthnum'])) {
$redirect_url = get_month_link($year, $month);
if ($redirect_url) {
$redirect['query'] = remove_query_arg(array('year', 'monthnum'), $redirect['query']);
}
} elseif (is_year() && !empty($_GET['year'])) {
$redirect_url = get_year_link($year);
if ($redirect_url) {
$redirect['query'] = remove_query_arg('year', $redirect['query']);
}
}
} elseif (is_author() && !empty($_GET['author']) && is_string($_GET['author']) && preg_match('|^[0-9]+$|', $_GET['author'])) {
$author = get_userdata(get_query_var('author'));
if (false !== $author && $wpdb->get_var($wpdb->prepare("SELECT ID FROM {$wpdb->posts} WHERE {$wpdb->posts}.post_author = %d AND {$wpdb->posts}.post_status = 'publish' LIMIT 1", $author->ID))) {
$redirect_url = get_author_posts_url($author->ID, $author->user_nicename);
$redirect_obj = $author;
if ($redirect_url) {
$redirect['query'] = remove_query_arg('author', $redirect['query']);
}
}
} elseif (is_category() || is_tag() || is_tax()) {
// Terms (tags/categories).
$term_count = 0;
foreach ($wp_query->tax_query->queried_terms as $tax_query) {
if (isset($tax_query['terms']) && is_countable($tax_query['terms'])) {
$term_count += count($tax_query['terms']);
}
}
$obj = $wp_query->get_queried_object();
if ($term_count <= 1 && !empty($obj->term_id)) {
$tax_url = get_term_link((int) $obj->term_id, $obj->taxonomy);
if ($tax_url && !is_wp_error($tax_url)) {
if (!empty($redirect['query'])) {
// Strip taxonomy query vars off the URL.
$qv_remove = array('term', 'taxonomy');
if (is_category()) {
$qv_remove[] = 'category_name';
$qv_remove[] = 'cat';
} elseif (is_tag()) {
$qv_remove[] = 'tag';
$qv_remove[] = 'tag_id';
} else {
// Custom taxonomies will have a custom query var, remove those too.
$tax_obj = get_taxonomy($obj->taxonomy);
if (false !== $tax_obj->query_var) {
$qv_remove[] = $tax_obj->query_var;
}
}
$rewrite_vars = array_diff(array_keys($wp_query->query), array_keys($_GET));
// Check to see if all the query vars are coming from the rewrite, none are set via $_GET.
if (!array_diff($rewrite_vars, array_keys($_GET))) {
// Remove all of the per-tax query vars.
$redirect['query'] = remove_query_arg($qv_remove, $redirect['query']);
// Create the destination URL for this taxonomy.
$tax_url = parse_url($tax_url);
if (!empty($tax_url['query'])) {
// Taxonomy accessible via ?taxonomy=...&term=... or any custom query var.
parse_str($tax_url['query'], $query_vars);
$redirect['query'] = add_query_arg($query_vars, $redirect['query']);
} else {
// Taxonomy is accessible via a "pretty URL".
$redirect['path'] = $tax_url['path'];
}
} else {
// Some query vars are set via $_GET. Unset those from $_GET that exist via the rewrite.
foreach ($qv_remove as $_qv) {
if (isset($rewrite_vars[$_qv])) {
$redirect['query'] = remove_query_arg($_qv, $redirect['query']);
}
}
}
}
}
}
} elseif (is_single() && str_contains($wp_rewrite->permalink_structure, '%category%')) {
$category_name = get_query_var('category_name');
if ($category_name) {
$category = get_category_by_path($category_name);
if (!$category || is_wp_error($category) || !has_term($category->term_id, 'category', $wp_query->get_queried_object_id())) {
$redirect_url = get_permalink($wp_query->get_queried_object_id());
$redirect_obj = get_post($wp_query->get_queried_object_id());
}
}
}
// Post paging.
if (is_singular() && get_query_var('page')) {
$page = get_query_var('page');
if (!$redirect_url) {
$redirect_url = get_permalink(get_queried_object_id());
$redirect_obj = get_post(get_queried_object_id());
}
if ($page > 1) {
$redirect_url = trailingslashit($redirect_url);
if (is_front_page()) {
$redirect_url .= user_trailingslashit("{$wp_rewrite->pagination_base}/{$page}", 'paged');
} else {
$redirect_url .= user_trailingslashit($page, 'single_paged');
}
}
$redirect['query'] = remove_query_arg('page', $redirect['query']);
}
if (get_query_var('sitemap')) {
$redirect_url = get_sitemap_url(get_query_var('sitemap'), get_query_var('sitemap-subtype'), get_query_var('paged'));
$redirect['query'] = remove_query_arg(array('sitemap', 'sitemap-subtype', 'paged'), $redirect['query']);
} elseif (get_query_var('paged') || is_feed() || get_query_var('cpage')) {
// Paging and feeds.
$paged = get_query_var('paged');
$feed = get_query_var('feed');
$cpage = get_query_var('cpage');
while (preg_match("#/{$wp_rewrite->pagination_base}/?[0-9]+?(/+)?\$#", $redirect['path']) || preg_match('#/(comments/?)?(feed|rss2?|rdf|atom)(/+)?$#', $redirect['path']) || preg_match("#/{$wp_rewrite->comments_pagination_base}-[0-9]+(/+)?\$#", $redirect['path'])) {
// Strip off any existing paging.
$redirect['path'] = preg_replace("#/{$wp_rewrite->pagination_base}/?[0-9]+?(/+)?\$#", '/', $redirect['path']);
// Strip off feed endings.
$redirect['path'] = preg_replace('#/(comments/?)?(feed|rss2?|rdf|atom)(/+|$)#', '/', $redirect['path']);
// Strip off any existing comment paging.
$redirect['path'] = preg_replace("#/{$wp_rewrite->comments_pagination_base}-[0-9]+?(/+)?\$#", '/', $redirect['path']);
}
$addl_path = '';
$default_feed = get_default_feed();
if (is_feed() && in_array($feed, $wp_rewrite->feeds, true)) {
$addl_path = (!empty($addl_path)) ? trailingslashit($addl_path) : '';
if (!is_singular() && get_query_var('withcomments')) {
$addl_path .= 'comments/';
}
if ('rss' === $default_feed && 'feed' === $feed || 'rss' === $feed) {
$format = ('rss2' === $default_feed) ? '' : 'rss2';
} else {
$format = ($default_feed === $feed || 'feed' === $feed) ? '' : $feed;
}
$addl_path .= user_trailingslashit('feed/' . $format, 'feed');
$redirect['query'] = remove_query_arg('feed', $redirect['query']);
} elseif (is_feed() && 'old' === $feed) {
$old_feed_files = array('wp-atom.php' => 'atom', 'wp-commentsrss2.php' => 'comments_rss2', 'wp-feed.php' => $default_feed, 'wp-rdf.php' => 'rdf', 'wp-rss.php' => 'rss2', 'wp-rss2.php' => 'rss2');
if (isset($old_feed_files[basename($redirect['path'])])) {
$redirect_url = get_feed_link($old_feed_files[basename($redirect['path'])]);
wp_redirect($redirect_url, 301);
die;
}
}
if ($paged > 0) {
$redirect['query'] = remove_query_arg('paged', $redirect['query']);
if (!is_feed()) {
if (!is_single()) {
$addl_path = (!empty($addl_path)) ? trailingslashit($addl_path) : '';
if ($paged > 1) {
$addl_path .= user_trailingslashit("{$wp_rewrite->pagination_base}/{$paged}", 'paged');
}
}
} elseif ($paged > 1) {
$redirect['query'] = add_query_arg('paged', $paged, $redirect['query']);
}
}
$default_comments_page = get_option('default_comments_page');
if (get_option('page_comments') && ('newest' === $default_comments_page && $cpage > 0 || 'newest' !== $default_comments_page && $cpage > 1)) {
$addl_path = (!empty($addl_path)) ? trailingslashit($addl_path) : '';
$addl_path .= user_trailingslashit($wp_rewrite->comments_pagination_base . '-' . $cpage, 'commentpaged');
$redirect['query'] = remove_query_arg('cpage', $redirect['query']);
}
// Strip off trailing /index.php/.
$redirect['path'] = preg_replace('|/' . preg_quote($wp_rewrite->index, '|') . '/?$|', '/', $redirect['path']);
$redirect['path'] = user_trailingslashit($redirect['path']);
if (!empty($addl_path) && $wp_rewrite->using_index_permalinks() && !str_contains($redirect['path'], '/' . $wp_rewrite->index . '/')) {
$redirect['path'] = trailingslashit($redirect['path']) . $wp_rewrite->index . '/';
}
if (!empty($addl_path)) {
$redirect['path'] = trailingslashit($redirect['path']) . $addl_path;
}
$redirect_url = $redirect['scheme'] . '://' . $redirect['host'] . $redirect['path'];
}
if ('wp-register.php' === basename($redirect['path'])) {
if (is_multisite()) {
/** This filter is documented in wp-login.php */
$redirect_url = apply_filters('wp_signup_location', network_site_url('wp-signup.php'));
} else {
$redirect_url = wp_registration_url();
}
wp_redirect($redirect_url, 301);
die;
}
}
$is_attachment_redirect = false;
if (is_attachment() && !get_option('wp_attachment_pages_enabled')) {
$attachment_id = get_query_var('attachment_id');
$attachment_post = get_post($attachment_id);
$attachment_parent_id = $attachment_post ? $attachment_post->post_parent : 0;
$attachment_url = wp_get_attachment_url($attachment_id);
if ($attachment_url !== $redirect_url) {
/*
* If an attachment is attached to a post, it inherits the parent post's status. Fetch the
* parent post to check its status later.
*/
if ($attachment_parent_id) {
$redirect_obj = get_post($attachment_parent_id);
}
$redirect_url = $attachment_url;
}
$is_attachment_redirect = true;
}
$redirect['query'] = preg_replace('#^\??&*?#', '', $redirect['query']);
// Tack on any additional query vars.
if ($redirect_url && !empty($redirect['query'])) {
parse_str($redirect['query'], $_parsed_query);
$redirect = parse_url($redirect_url);
if (!empty($_parsed_query['name']) && !empty($redirect['query'])) {
parse_str($redirect['query'], $_parsed_redirect_query);
if (empty($_parsed_redirect_query['name'])) {
unset($_parsed_query['name']);
}
}
$_parsed_query = array_combine(rawurlencode_deep(array_keys($_parsed_query)), rawurlencode_deep(array_values($_parsed_query)));
$redirect_url = add_query_arg($_parsed_query, $redirect_url);
}
if ($redirect_url) {
$redirect = parse_url($redirect_url);
}
// www.example.com vs. example.com
$user_home = parse_url(home_url());
if (!empty($user_home['host'])) {
$redirect['host'] = $user_home['host'];
}
if (empty($user_home['path'])) {
$user_home['path'] = '/';
}
// Handle ports.
if (!empty($user_home['port'])) {
$redirect['port'] = $user_home['port'];
} else {
unset($redirect['port']);
}
// Trailing /index.php.
$redirect['path'] = preg_replace('|/' . preg_quote($wp_rewrite->index, '|') . '/*?$|', '/', $redirect['path']);
$punctuation_pattern = implode('|', array_map('preg_quote', array(
' ',
'%20',
// Space.
'!',
'%21',
// Exclamation mark.
'"',
'%22',
// Double quote.
"'",
'%27',
// Single quote.
'(',
'%28',
// Opening bracket.
')',
'%29',
// Closing bracket.
',',
'%2C',
// Comma.
'.',
'%2E',
// Period.
';',
'%3B',
// Semicolon.
'{',
'%7B',
// Opening curly bracket.
'}',
'%7D',
// Closing curly bracket.
'%E2%80%9C',
// Opening curly quote.
'%E2%80%9D',
)));
// Remove trailing spaces and end punctuation from the path.
$redirect['path'] = preg_replace("#({$punctuation_pattern})+\$#", '', $redirect['path']);
if (!empty($redirect['query'])) {
// Remove trailing spaces and end punctuation from certain terminating query string args.
$redirect['query'] = preg_replace("#((^|&)(p|page_id|cat|tag)=[^&]*?)({$punctuation_pattern})+\$#", '$1', $redirect['query']);
// Clean up empty query strings.
$redirect['query'] = trim(preg_replace('#(^|&)(p|page_id|cat|tag)=?(&|$)#', '&', $redirect['query']), '&');
// Redirect obsolete feeds.
$redirect['query'] = preg_replace('#(^|&)feed=rss(&|$)#', '$1feed=rss2$2', $redirect['query']);
// Remove redundant leading ampersands.
$redirect['query'] = preg_replace('#^\??&*?#', '', $redirect['query']);
}
// Strip /index.php/ when we're not using PATHINFO permalinks.
if (!$wp_rewrite->using_index_permalinks()) {
$redirect['path'] = str_replace('/' . $wp_rewrite->index . '/', '/', $redirect['path']);
}
// Trailing slashes.
if (is_object($wp_rewrite) && $wp_rewrite->using_permalinks() && !$is_attachment_redirect && !is_404() && (!is_front_page() || is_front_page() && get_query_var('paged') > 1)) {
$user_ts_type = '';
if (get_query_var('paged') > 0) {
$user_ts_type = 'paged';
} else {
foreach (array('single', 'category', 'page', 'day', 'month', 'year', 'home') as $type) {
$func = 'is_' . $type;
if (call_user_func($func)) {
$user_ts_type = $type;
break;
}
}
}
$redirect['path'] = user_trailingslashit($redirect['path'], $user_ts_type);
} elseif (is_front_page()) {
$redirect['path'] = trailingslashit($redirect['path']);
}
// Remove trailing slash for robots.txt or sitemap requests.
if (is_robots() || !empty(get_query_var('sitemap')) || !empty(get_query_var('sitemap-stylesheet'))) {
$redirect['path'] = untrailingslashit($redirect['path']);
}
// Strip multiple slashes out of the URL.
if (str_contains($redirect['path'], '//')) {
$redirect['path'] = preg_replace('|/+|', '/', $redirect['path']);
}
// Always trailing slash the Front Page URL.
if (trailingslashit($redirect['path']) === trailingslashit($user_home['path'])) {
$redirect['path'] = trailingslashit($redirect['path']);
}
$original_host_low = strtolower($original['host']);
$redirect_host_low = strtolower($redirect['host']);
/*
* Ignore differences in host capitalization, as this can lead to infinite redirects.
* Only redirect no-www <=> yes-www.
*/
if ($original_host_low === $redirect_host_low || 'www.' . $original_host_low !== $redirect_host_low && 'www.' . $redirect_host_low !== $original_host_low) {
$redirect['host'] = $original['host'];
}
$compare_original = array($original['host'], $original['path']);
if (!empty($original['port'])) {
$compare_original[] = $original['port'];
}
if (!empty($original['query'])) {
$compare_original[] = $original['query'];
}
$compare_redirect = array($redirect['host'], $redirect['path']);
if (!empty($redirect['port'])) {
$compare_redirect[] = $redirect['port'];
}
if (!empty($redirect['query'])) {
$compare_redirect[] = $redirect['query'];
}
if ($compare_original !== $compare_redirect) {
$redirect_url = $redirect['scheme'] . '://' . $redirect['host'];
if (!empty($redirect['port'])) {
$redirect_url .= ':' . $redirect['port'];
}
$redirect_url .= $redirect['path'];
if (!empty($redirect['query'])) {
$redirect_url .= '?' . $redirect['query'];
}
}
if (!$redirect_url || $redirect_url === $requested_url) {
return;
}
// Hex-encoded octets are case-insensitive.
if (str_contains($requested_url, '%')) {
if (!function_exists('lowercase_octets')) {
/**
* Converts the first hex-encoded octet match to lowercase.
*
* @since 3.1.0
* @ignore
*
* @param array $matches Hex-encoded octet matches for the requested URL.
* @return string Lowercased version of the first match.
*/
function lowercase_octets($matches)
{
return strtolower($matches[0]);
}
}
$requested_url = preg_replace_callback('|%[a-fA-F0-9][a-fA-F0-9]|', 'lowercase_octets', $requested_url);
}
if ($redirect_obj instanceof WP_Post) {
$post_status_obj = get_post_status_object(get_post_status($redirect_obj));
/*
* Unset the redirect object and URL if they are not readable by the user.
* This condition is a little confusing as the condition needs to pass if
* the post is not readable by the user. That's why there are ! (not) conditions
* throughout.
*/
if (!($post_status_obj->private && current_user_can('read_post', $redirect_obj->ID)) && !is_post_publicly_viewable($redirect_obj)) {
$redirect_obj = false;
$redirect_url = false;
}
}
/**
* Filters the canonical redirect URL.
*
* Returning false to this filter will cancel the redirect.
*
* @since 2.3.0
*
* @param string $redirect_url The redirect URL.
* @param string $requested_url The requested URL.
*/
$redirect_url = apply_filters('redirect_canonical', $redirect_url, $requested_url);
// Yes, again -- in case the filter aborted the request.
if (!$redirect_url || strip_fragment_from_url($redirect_url) === strip_fragment_from_url($requested_url)) {
return;
}
if ($do_redirect) {
// Protect against chained redirects.
if (!redirect_canonical($redirect_url, false)) {
wp_redirect($redirect_url, 301);
exit;
} else {
// Debug.
// die("1: $redirect_url<br />2: " . redirect_canonical( $redirect_url, false ) );
return;
}
} else {
return $redirect_url;
}
}