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permalink-manager/includes/core/permalink-manager-core-functions.php

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  1. <?php
  2.  
  3. /**
  4. * Core functions
  5. */
  6. class Permalink_Manager_Core_Functions extends Permalink_Manager_Class {
  7.  
  8.     public function __construct() {
  9.         add_action( 'init', array($this, 'init_hooks'), 99);
  10.     }
  11.  
  12.     function init_hooks() {
  13.         global $permalink_manager_options;
  14.  
  15.         // Trailing slashes
  16.         add_filter( 'permalink_manager_filter_final_term_permalink', array($this, 'control_trailing_slashes'), 9);
  17.         add_filter( 'permalink_manager_filter_final_post_permalink', array($this, 'control_trailing_slashes'), 9);
  18.         add_filter( 'permalink_manager_filter_post_sample_uri', array($this, 'control_trailing_slashes'), 9);
  19.         add_filter( 'wpseo_canonical', array($this, 'control_trailing_slashes'), 9);
  20.         add_filter( 'wpseo_opengraph_url', array($this, 'control_trailing_slashes'), 9);
  21.         add_filter( 'paginate_links', array($this, 'control_trailing_slashes'), 9);
  22.  
  23.         /**
  24.          * Detect & canonical URL/redirect functions
  25.          */
  26.         // Do not trigger in back-end
  27.         if(is_admin()) { return false; }
  28.  
  29.         // Do not trigger if Customizer is loaded
  30.         if(function_exists('is_customize_preview') && is_customize_preview()) { return false; }
  31.  
  32.         // Use the URIs set in this plugin
  33.         add_filter( 'request', array($this, 'detect_post'), 0, 1 );
  34.  
  35.         // Redirect from old URIs to new URIs  + adjust canonical redirect settings
  36.         add_action( 'template_redirect', array($this, 'new_uri_redirect_and_404'), 1);
  37.         add_action( 'wp', array($this, 'adjust_canonical_redirect'), 0, 1);
  38.  
  39.         // Case insensitive permalinks
  40.         if(!empty($permalink_manager_options['general']['case_insensitive_permalinks'])) {
  41.             add_action( 'parse_request', array($this, 'case_insensitive_permalinks'), 0);
  42.         }
  43.         // Force 404 on non-existing pagination pages
  44.         if(!empty($permalink_manager_options['general']['pagination_redirect'])) {
  45.             add_action( 'wp', array($this, 'fix_pagination_pages'), 0);
  46.         }
  47.     }
  48.  
  49.     /**
  50.     * The most important Permalink Manager function
  51.     */
  52.     public static function detect_post($query, $request_url = false, $return_object = false) {
  53.         global $wpdb, $wp, $wp_rewrite, $permalink_manager, $permalink_manager_uris, $wp_filter, $permalink_manager_options, $pm_query;
  54.  
  55.         // Check if the array with custom URIs is set
  56.         if(!(is_array($permalink_manager_uris))) return $query;
  57.  
  58.         // Used in debug mode & endpoints
  59.         $old_query = $query;
  60.  
  61.         /**
  62.         * 1. Prepare URL and check if it is correct (make sure that both requested URL & home_url share the same protoocl and get rid of www prefix)
  63.         */
  64.         $request_url = (!empty($request_url)) ? parse_url($request_url, PHP_URL_PATH) : $_SERVER['REQUEST_URI'];
  65.         $request_url = strtok($request_url, "?");
  66.  
  67.         $http_host = (!empty($_SERVER['HTTP_HOST'])) ? $_SERVER['HTTP_HOST'] : preg_replace('/www\./i', '', $_SERVER['SERVER_NAME']);
  68.         $request_url = sprintf("http://%s%s", str_replace("www.", "", $http_host), $request_url);
  69.         $raw_home_url = trim(get_option('home'));
  70.         $home_url = preg_replace("/http(s)?:\/\/(www\.)?(.+?)\/?$/", "http://$3", $raw_home_url);
  71.  
  72.         if(filter_var($request_url, FILTER_VALIDATE_URL)) {
  73.             // Check if "Deep Detect" is enabled
  74.             $deep_detect_enabled = apply_filters('permalink_manager_deep_uri_detect', $permalink_manager_options['general']['deep_detect']);
  75.  
  76.             // Sanitize the URL
  77.             // $request_url = filter_var($request_url, FILTER_SANITIZE_URL);
  78.  
  79.             // Keep only the URI
  80.             $request_url = str_replace($home_url, "", $request_url);
  81.  
  82.             // Hotfix for language plugins
  83.             if(filter_var($request_url, FILTER_VALIDATE_URL)) {
  84.                 $request_url = parse_url($request_url, PHP_URL_PATH);
  85.             }
  86.  
  87.             $request_url = trim($request_url, "/");
  88.  
  89.             // Get all the endpoints & pattern
  90.             $endpoints = Permalink_Manager_Helper_Functions::get_endpoints();
  91.             $pattern = "/^(.+?)(?|\/({$endpoints})(?|\/(.*)|$)|\/()([\d]+)\/?)?$/i";
  92.  
  93.             // Use default REGEX to detect post
  94.             preg_match($pattern, $request_url, $regex_parts);
  95.             $uri_parts['lang'] = false;
  96.             $uri_parts['uri'] = (!empty($regex_parts[1])) ? $regex_parts[1] : "";
  97.             $uri_parts['endpoint'] = (!empty($regex_parts[2])) ? $regex_parts[2] : "";
  98.             $uri_parts['endpoint_value'] = (!empty($regex_parts[3])) ? $regex_parts[3] : "";
  99.  
  100.             // Allow to filter the results by third-parties + store the URI parts with $pm_query global
  101.             $uri_parts = apply_filters('permalink_manager_detect_uri', $uri_parts, $request_url, $endpoints);
  102.  
  103.             // Support comment pages
  104.             preg_match("/(.*)\/{$wp_rewrite->comments_pagination_base}-([\d]+)/", $request_url, $regex_parts);
  105.             if(!empty($regex_parts[2])) {
  106.                 $uri_parts['uri'] = $regex_parts[1];
  107.                 $uri_parts['endpoint'] = 'cpage';
  108.                 $uri_parts['endpoint_value'] = $regex_parts[2];
  109.             }
  110.  
  111.             // Support pagination endpoint
  112.             if($uri_parts['endpoint'] == $wp_rewrite->pagination_base) {
  113.                 $uri_parts['endpoint'] = 'page';
  114.             }
  115.  
  116.             // Stop the function if $uri_parts is empty
  117.             if(empty($uri_parts)) return $query;
  118.  
  119.             // Store the URI parts in a separate global variable
  120.             $pm_query = $uri_parts;
  121.  
  122.             // Get the URI parts from REGEX parts
  123.             $lang = $uri_parts['lang'];
  124.             $uri = $uri_parts['uri'];
  125.             $endpoint = $uri_parts['endpoint'];
  126.             $endpoint_value = $uri_parts['endpoint_value'];
  127.  
  128.             // Trim slashes
  129.             $uri = trim($uri, "/");
  130.  
  131.             // Ignore URLs with no URI grabbed
  132.             if(empty($uri)) return $query;
  133.  
  134.             // Store an array with custom permalinks in a separate variable
  135.             $all_uris = $permalink_manager_uris;
  136.  
  137.             // Check what content type should be loaded in case of duplicate ("posts" or "terms")
  138.             $duplicates_priority = apply_filters('permalink_manager_duplicates_priority', false);
  139.             if($duplicates_priority !== false) {
  140.                 $uri_count = array_count_values($all_uris);
  141.  
  142.                 foreach($uri_count as $duplicated_uri => $count) {
  143.                     if($count <= 1) { continue; }
  144.  
  145.                     $duplicates_ids = array_keys($all_uris, $duplicated_uri);
  146.  
  147.                     foreach($duplicates_ids as $id) {
  148.                         if($duplicates_priority == 'posts' && !is_numeric($id)) {
  149.                             unset($all_uris[$id]);
  150.                         } else if($duplicates_priority !== 'posts' && is_numeric($id)) {
  151.                             unset($all_uris[$id]);
  152.                         }
  153.                     }
  154.                 }
  155.             }
  156.  
  157.             // Exclude draft posts
  158.             /*$exclude_drafts = apply_filters('permalink_manager_exclude_drafts', false);
  159.             if($exclude_drafts !== false) {
  160.                 $post_ids = $wpdb->get_col("SELECT DISTINCT ID FROM {$wpdb->posts} AS p WHERE p.post_status = 'draft' ORDER BY ID DESC");
  161.                 if(!empty($post_ids)) {
  162.                     foreach($post_ids as $post_id) {
  163.                         unset($permalink_manager_uris[$post_id]);
  164.                     }
  165.                 }
  166.             }*/
  167.  
  168.             // Flip array for better performance
  169.             $all_uris = array_flip($all_uris);
  170.  
  171.             // Attempt 1.
  172.             // Find the element ID
  173.             $element_id = isset($all_uris[$uri]) ? $all_uris[$uri] : false;
  174.  
  175.             // Atempt 2.
  176.             // Decode both request URI & URIs array & make them lowercase (and save in a separate variable)
  177.             if(empty($element_id)) {
  178.                 $uri = strtolower(urldecode($uri));
  179.  
  180.                 foreach($all_uris as $raw_uri => $uri_id) {
  181.                     $raw_uri = urldecode($raw_uri);
  182.                     $all_uris[$raw_uri] = $uri_id;
  183.                 }
  184.  
  185.                 // Convert array keys lowercase
  186.                 $all_uris = array_change_key_case($all_uris, CASE_LOWER);
  187.  
  188.                 $element_id = isset($all_uris[$uri]) ? $all_uris[$uri] : $element_id;
  189.             }
  190.  
  191.             // Atempt 3.
  192.             // Check again in case someone used post/tax IDs instead of slugs
  193.             if($deep_detect_enabled && is_numeric($endpoint_value) && isset($all_uris["{$uri}/{$endpoint_value}"])) {
  194.                 $element_id = $all_uris["{$uri}/{$endpoint_value}"];
  195.                 $endpoint_value = $endpoint = "";
  196.             }
  197.  
  198.             // Atempt 4.
  199.             // Check again for attachment custom URIs
  200.             if(empty($element_id) && isset($old_query['attachment'])) {
  201.                 $element_id = isset($all_uris["{$uri}/{$endpoint}/{$endpoint_value}"]) ? $all_uris["{$uri}/{$endpoint}/{$endpoint_value}"] : $element_id;
  202.  
  203.                 if($element_id) {
  204.                     $endpoint_value = $endpoint = "";
  205.                 }
  206.             }
  207.  
  208.             // Allow to filter the item_id by third-parties after initial detection
  209.             $element_id = apply_filters('permalink_manager_detected_element_id', $element_id, $uri_parts, $request_url);
  210.  
  211.             // Clear the original query before it is filtered
  212.             $query = ($element_id) ? array() : $query;
  213.  
  214.             /**
  215.             * 3A. Custom URI assigned to taxonomy
  216.             */
  217.             if(strpos($element_id, 'tax-') !== false) {
  218.                 // Remove the "tax-" prefix
  219.                 $term_id = intval(preg_replace("/[^0-9]/", "", $element_id));
  220.  
  221.                 // Filter detected post ID
  222.                 $term_id = apply_filters('permalink_manager_detected_term_id', intval($term_id), $uri_parts, true);
  223.  
  224.                 // Get the variables to filter wp_query and double-check if taxonomy exists
  225.                 $term = get_term($term_id);
  226.                 $term_taxonomy = (!empty($term->taxonomy)) ? $term->taxonomy : false;
  227.  
  228.                 // Check if taxonomy is allowed
  229.                 $disabled = ($term_taxonomy && Permalink_Manager_Helper_Functions::is_disabled($term_taxonomy, 'taxonomy')) ? true : false;
  230.  
  231.                 // Proceed only if the term is not removed and its taxonomy is not disabled
  232.                 if(!$disabled && $term_taxonomy) {
  233.                     // Get some term data
  234.                     if($term_taxonomy == 'category') {
  235.                         $query_parameter = 'category_name';
  236.                     } else if($term_taxonomy == 'post_tag') {
  237.                         $query_parameter = 'tag';
  238.                     } else {
  239.                         $query["taxonomy"] = $term_taxonomy;
  240.                         $query_parameter = $term_taxonomy;
  241.                     }
  242.                     $term_ancestors = get_ancestors($term_id, $term_taxonomy);
  243.                     $final_uri = $term->slug;
  244.  
  245.                     // Fix for hierarchical terms
  246.                     if(!empty($term_ancestors)) {
  247.                         foreach ($term_ancestors as $parent_id) {
  248.                             $parent = get_term((int) $parent_id, $term_taxonomy);
  249.                             if(!empty($parent->slug)) {
  250.                                 $final_uri = $parent->slug . '/' . $final_uri;
  251.                             }
  252.                         }
  253.                     }
  254.  
  255.                     //$query["term"] = $final_uri;
  256.                     $query["term"] = $term->slug;
  257.                     //$query[$query_parameter] = $final_uri;
  258.                     $query[$query_parameter] = $term->slug;
  259.                 } else if($disabled) {
  260.                     $broken_uri = true;
  261.                     $query = $old_query;
  262.                 } else {
  263.                     $query = $old_query;
  264.                 }
  265.             }
  266.             /**
  267.             * 3B. Custom URI assigned to post/page/cpt item
  268.             */
  269.             else if(isset($element_id) && is_numeric($element_id)) {
  270.                 // Fix for revisions
  271.                 $is_revision = wp_is_post_revision($element_id);
  272.                 if($is_revision) {
  273.                     $revision_id = $element_id;
  274.                     $element_id = $is_revision;
  275.                 }
  276.  
  277.                 // Filter detected post ID
  278.                 $element_id = apply_filters('permalink_manager_detected_post_id', $element_id, $uri_parts);
  279.  
  280.                 $post_to_load = get_post($element_id);
  281.                 $final_uri = (!empty($post_to_load->post_name)) ? $post_to_load->post_name : false;
  282.                 $post_type = (!empty($post_to_load->post_type)) ? $post_to_load->post_type : false;
  283.  
  284.                 // Check if post type is allowed
  285.                 $disabled = ($post_type && Permalink_Manager_Helper_Functions::is_disabled($post_type, 'post_type')) ? true : false;
  286.  
  287.                 // Proceed only if the term is not removed and its taxonomy is not disabled
  288.                 if(!$disabled && $post_type) {
  289.                     $post_type_object = get_post_type_object($post_type);
  290.  
  291.                     // Fix for hierarchical CPT & pages
  292.                     if(!(empty($post_to_load->ancestors)) && !empty($post_type_object->hierarchical)) {
  293.                         foreach ($post_to_load->ancestors as $parent) {
  294.                             $parent = get_post($parent);
  295.                             if($parent && $parent->post_name) {
  296.                                 $final_uri = $parent->post_name . '/' . $final_uri;
  297.                             }
  298.                         }
  299.                     }
  300.  
  301.                     // Alter query parameters + support drafts URLs
  302.                     if($post_to_load->post_status == 'draft' || empty($final_uri)) {
  303.                         if(is_user_logged_in()) {
  304.                             if($post_type == 'page') {
  305.                                 $query['page_id'] = $element_id;
  306.                             } else {
  307.                                 $query['p'] = $element_id;
  308.                             }
  309.  
  310.                             $query['preview'] = true;
  311.                             $query['post_type'] = $post_type;
  312.                         } else if($post_to_load->post_status == 'draft') {
  313.                             $query['pagename'] = '-';
  314.                             $query['error'] = '404';
  315.  
  316.                             $element_id = 0;
  317.                         } else {
  318.                             $query = $old_query;
  319.                         }
  320.                     } else if($post_type == 'page') {
  321.                         $query['pagename'] = $final_uri;
  322.                         // $query['post_type'] = $post_type;
  323.                     } else if($post_type == 'post') {
  324.                         $query['name'] = $final_uri;
  325.                     } else if($post_type == 'attachment') {
  326.                         $query['attachment'] = $final_uri;
  327.                     } else {
  328.                         // Get the query var
  329.                         $query_var = (!empty($post_type_object->query_var)) ? $post_type_object->query_var : $post_type;
  330.  
  331.                         $query['name'] = $final_uri;
  332.                         $query['post_type'] = $post_type;
  333.                         $query[$query_var] = $final_uri;
  334.                     }
  335.                 } else if($disabled) {
  336.                     $broken_uri = true;
  337.                     $query = $old_query;
  338.                 } else {
  339.                     $query = $old_query;
  340.                 }
  341.             }
  342.  
  343.             /**
  344.              * 4. Auto-remove removed term custom URI & redirects (works if enabled in plugin settings)
  345.              */
  346.             if(!empty($broken_uri) && (!empty($permalink_manager_options['general']['auto_remove_duplicates'])) && $permalink_manager_options['general']['auto_remove_duplicates'] == 1) {
  347.                 $broken_element_id = (!empty($revision_id)) ? $revision_id : $element_id;
  348.                 $remove_broken_uri = Permalink_Manager_Actions::force_clear_single_element_uris_and_redirects($broken_element_id);
  349.  
  350.                 // Reload page if success
  351.                 if($remove_broken_uri && !headers_sent()) {
  352.                     header("Refresh:0");
  353.                     exit();
  354.                 }
  355.             }
  356.  
  357.             /**
  358.              * 5A. Endpoints
  359.              */
  360.             if(!empty($element_id) && (!empty($endpoint) || !empty($endpoint_value))) {
  361.                 if(is_array($endpoint)) {
  362.                     foreach($endpoint as $endpoint_name => $endpoint_value) {
  363.                         $query[$endpoint_name] = $endpoint_value;
  364.                     }
  365.                 } else if($endpoint == 'feed') {
  366.                     $query[$endpoint] = 'feed';
  367.                 } else if($endpoint == 'embed') {
  368.                     $query[$endpoint] = true;
  369.                 } else if($endpoint == 'page') {
  370.                     $endpoint = 'paged';
  371.                     $query[$endpoint] = $endpoint_value;
  372.                 } else if($endpoint == 'trackback') {
  373.                     $endpoint = 'tb';
  374.                     $query[$endpoint] = 1;
  375.                 } else if(empty($endpoint) && is_numeric($endpoint_value)) {
  376.                     $query['page'] = $endpoint_value;
  377.                 } else {
  378.                     $query[$endpoint] = $endpoint_value;
  379.                 }
  380.  
  381.                 // Fix for attachments
  382.                 if(!empty($query['attachment'])) {
  383.                     $query = array('attachment' => $query['attachment'], 'do_not_redirect' => 1);
  384.                 }
  385.             }
  386.  
  387.             /**
  388.              * 5B. Endpoints - check if any endpoint is set with $_GET parameter
  389.              */
  390.             if(!empty($element_id) && $deep_detect_enabled && !empty($_GET)) {
  391.                 $get_endpoints = array_intersect($wp->public_query_vars, array_keys($_GET));
  392.  
  393.                 if(!empty($get_endpoints)) {
  394.                     // Append query vars from $_GET parameters
  395.                     foreach($get_endpoints as $endpoint) {
  396.                         // Numeric endpoints
  397.                         $endpoint_value = (in_array($endpoint, array('page', 'paged', 'attachment_id'))) ? filter_var($_GET[$endpoint], FILTER_SANITIZE_NUMBER_INT) : $_GET[$endpoint];
  398.  
  399.                         // Ignore page endpoint if its value is 1
  400.                         if(in_array($endpoint, array('page', 'paged')) && $endpoint_value == 1) { continue; }
  401.  
  402.                         $query[$endpoint] = sanitize_text_field($endpoint_value);
  403.                     }
  404.                 }
  405.             }
  406.  
  407.             /**
  408.              * 6. Set global with detected item id
  409.              */
  410.             if(!empty($element_id)) {
  411.                 $pm_query['id'] = $element_id;
  412.  
  413.                 // Make the redirects more clever - see new_uri_redirect_and_404() method
  414.                 $query['do_not_redirect'] = 1;
  415.             }
  416.         }
  417.  
  418.         /**
  419.          * 7. Debug data
  420.          */
  421.         if(!empty($taxonomy)) {
  422.             $content_type = "Taxonomy: {$term_taxonomy}";
  423.         } else if(!empty($post_type)) {
  424.             $content_type = "Post type: {$post_type}";
  425.         } else {
  426.             $content_type = '';
  427.         }
  428.         $uri_parts = (!empty($uri_parts)) ? $uri_parts : '';
  429.         $query = apply_filters('permalink_manager_filter_query', $query, $old_query, $uri_parts, $pm_query, $content_type);
  430.  
  431.         if($return_object && !empty($term)) {
  432.             return $term;
  433.         } else if($return_object && !empty($post_to_load)) {
  434.             return $post_to_load;
  435.         } else {
  436.             return $query;
  437.         }
  438.     }
  439.  
  440.     /**
  441.      * Trailing slash & remove BOM and double slashes
  442.      */
  443.     static function control_trailing_slashes($permalink) {
  444.         global $permalink_manager_options;
  445.  
  446.         // Ignore empty permalinks
  447.         if(empty($permalink)) { return $permalink; }
  448.  
  449.         // Keep the original permalink in a separate variable
  450.         $original_permalink = $permalink;
  451.  
  452.         $trailing_slash_setting = (!empty($permalink_manager_options['general']['trailing_slashes'])) ? $permalink_manager_options['general']['trailing_slashes'] : "";
  453.  
  454.         // Remove trailing slashes from URLs that end with file extension (eg. .html)
  455.         //if(preg_match('/.*\.([a-zA-Z]{3,4})\/?$/', $permalink)) {
  456.         if(preg_match('/(http(?:s)?:\/\/(?:[^\/]+)\/.*\.([a-zA-Z]{3,4}))\/?$/', $permalink)) {
  457.             $permalink = preg_replace('/^(?!http(?:s):\/\/[^\/]+\/$)(.+?)([\/]*)(\[\?\#][^\/]+|$)/', '$1$3', $permalink); // Instead of untrailingslashit()
  458.         } else {
  459.             // Add trailing slashes
  460.             if(in_array($trailing_slash_setting, array(1, 10))) {
  461.                 $permalink = preg_replace('/(.+?)([\/]*)(\[\?\#][^\/]+|$)/', '$1/$3', $permalink); // Instead of trailingslashit()
  462.             }
  463.             // Remove trailing slashes
  464.             else if(in_array($trailing_slash_setting, array(2, 20))) {
  465.                 $permalink = preg_replace('/(.+?)([\/]*)(\[\?\#][^\/]+|$)/', '$1$3', $permalink); // Instead of untrailingslashit()
  466.             }
  467.             // Default settings
  468.             else {
  469.                 $permalink = user_trailingslashit($permalink);
  470.             }
  471.         }
  472.  
  473.         // Remove double slashes
  474.         $permalink = preg_replace('/([^:])(\/{2,})/', '$1/', $permalink);
  475.  
  476.         // Remove trailing slashes from URLs that end with query string or anchors
  477.         $permalink = preg_replace('/([\?\#]{1}[^\/]+)([\/]+)$/', '$1', $permalink);
  478.  
  479.         return apply_filters('permalink_manager_control_trailing_slashes', $permalink, $original_permalink);
  480.     }
  481.  
  482.     /**
  483.      * Display 404 if requested page does not exist in pagination
  484.      */
  485.     function fix_pagination_pages() {
  486.         global $wp_query, $pm_query;
  487.  
  488.         // 1. Get the queried object
  489.         $post = get_queried_object();
  490.  
  491.         // 2. Check if post object is defined
  492.         if(!empty($post->post_type) && !empty($post->post_content)) {
  493.             // 2A. Check if pagination is detected
  494.             $current_page = (!empty($wp_query->query_vars['page'])) ? $wp_query->query_vars['page'] : 1;
  495.             $current_page = (empty($wp_query->query_vars['page']) && !empty($wp_query->query_vars['paged'])) ? $wp_query->query_vars['paged'] : $current_page;
  496.  
  497.             // 2B. Count post pages
  498.             $num_pages = (is_home() || is_archive()) ? $wp_query->max_num_pages : substr_count(strtolower($post->post_content), '<!--nextpage-->') + 1;
  499.  
  500.             $is_404 = ($current_page > 1 && ($current_page > $num_pages)) ? true : false;
  501.         }
  502.         // 3. Force 404 if no posts are loaded
  503.         else if(!empty($wp_query->query['paged']) && $wp_query->post_count == 0) {
  504.             $is_404 = true;
  505.         }
  506.         // 4. Force 404 if endpoint value is not set
  507.         else if(!empty($pm_query['endpoint']) && $pm_query['endpoint'] == 'page' && empty($pm_query['endpoint_value'])) {
  508.             $is_404 = true;
  509.         }
  510.  
  511.         // 5. Block non-existent pages (Force 404 error)
  512.         if(!empty($is_404)) {
  513.             $wp_query->is_404 = true;
  514.             $wp_query->query = $wp_query->queried_object = $wp_query->queried_object_id = null;
  515.             $wp_query->set_404();
  516.  
  517.             status_header(404);
  518.             nocache_headers();
  519.             include(get_query_template('404'));
  520.  
  521.             die();
  522.         }
  523.     }
  524.  
  525.     /**
  526.      * Redirects
  527.      */
  528.     function new_uri_redirect_and_404() {
  529.         global $wp_query, $wp, $wp_rewrite, $wpdb, $permalink_manager_uris, $permalink_manager_redirects, $permalink_manager_external_redirects, $permalink_manager_options, $pm_query;
  530.  
  531.         // Get the redirection mode & trailing slashes settings
  532.         $redirect_mode = (!empty($permalink_manager_options['general']['redirect'])) ? $permalink_manager_options['general']['redirect'] : false;
  533.         $trailing_slashes_mode = (!empty($permalink_manager_options['general']['trailing_slashes'])) ? $permalink_manager_options['general']['trailing_slashes'] : false;
  534.         $trailing_slashes_redirect = (!empty($permalink_manager_options['general']['trailing_slashes_redirect'])) ? $permalink_manager_options['general']['trailing_slashes_redirect'] : false;
  535.         $canonical_redirect = (!empty($permalink_manager_options['general']['canonical_redirect'])) ? $permalink_manager_options['general']['canonical_redirect'] : false;
  536.         $old_slug_redirect = (!empty($permalink_manager_options['general']['old_slug_redirect'])) ? $permalink_manager_options['general']['old_slug_redirect'] : false;
  537.         $endpoint_redirect = (!empty($permalink_manager_options['general']['endpoint_redirect'])) ? $permalink_manager_options['general']['endpoint_redirect'] : false;
  538.         $pagination_redirect = (!empty($permalink_manager_options['general']['pagination_redirect'])) ? $permalink_manager_options['general']['pagination_redirect'] : false;
  539.         $redirect_type = '-';
  540.  
  541.         // Get home URL
  542.         $home_url = rtrim(get_option('home'), "/");
  543.         $home_dir = parse_url($home_url, PHP_URL_PATH);
  544.  
  545.         // Set up $correct_permalink variable
  546.         $correct_permalink = '';
  547.  
  548.         // Get query string & URI
  549.         $query_string = (!empty($_SERVER['QUERY_STRING'])) ? $_SERVER['QUERY_STRING'] : '';
  550.         $old_uri = $_SERVER['REQUEST_URI'];
  551.  
  552.         // Fix for WP installed in directories (remove the directory name from the URI)
  553.         if(!empty($home_dir)) {
  554.             $home_dir_regex = preg_quote(trim($home_dir), "/");
  555.             $old_uri = preg_replace("/{$home_dir_regex}/", "", $old_uri, 1);
  556.         }
  557.  
  558.         // Do not use custom redirects on author pages, search & front page
  559.     if(!is_author() && !is_front_page() && !is_home() && !is_feed() && !is_search() && empty($_GET['s'])) {
  560.             // Unset 404 if custom URI is detected
  561.             if(isset($pm_query['id'])) {
  562.                 $wp_query->is_404 = false;
  563.             }
  564.  
  565.             // Sometimes $wp_query indicates the wrong object if requested directly
  566.             $queried_object = get_queried_object();
  567.  
  568.             /**
  569.              * 1A. External redirect
  570.              */
  571.             if(!empty($pm_query['id']) && !empty($permalink_manager_external_redirects[$pm_query['id']])) {
  572.                 $external_url = $permalink_manager_external_redirects[$pm_query['id']];
  573.  
  574.                 if(filter_var($external_url, FILTER_VALIDATE_URL)) {
  575.                     // Allow redirect
  576.                     $wp_query->query_vars['do_not_redirect'] = 0;
  577.  
  578.                     wp_redirect($external_url, 301, PERMALINK_MANAGER_PLUGIN_NAME);
  579.                     exit();
  580.                 }
  581.             }
  582.  
  583.             /**
  584.              * 1B. Custom redirects
  585.              */
  586.             if(empty($wp_query->query_vars['do_not_redirect']) && !empty($permalink_manager_redirects) && is_array($permalink_manager_redirects) && !empty($wp->request) && !empty($pm_query['uri'])) {
  587.                 $uri = $pm_query['uri'];
  588.                 $endpoint_value = $pm_query['endpoint_value'];
  589.  
  590.                 // Make sure that URIs with non-ASCII characters are also detected + Check the URLs that end with number
  591.                 $decoded_url = urldecode($uri);
  592.                 $endpoint_url = "{$uri}/{$endpoint_value}";
  593.  
  594.                 // Check if the URI is not assigned to any post/term's redirects
  595.                 foreach($permalink_manager_redirects as $element => $redirects) {
  596.                     if(!is_array($redirects)) { continue; }
  597.  
  598.                     if(in_array($uri, $redirects) || in_array($decoded_url, $redirects) || (is_numeric($endpoint_value) && in_array($endpoint_url, $redirects))) {
  599.                         // Post is detected
  600.                         if(is_numeric($element)) {
  601.                             $correct_permalink = get_permalink($element);
  602.                         }
  603.                         // Term is detected
  604.                         else {
  605.                             $term_id = intval(preg_replace("/[^0-9]/", "", $element));
  606.                             $correct_permalink = get_term_link($term_id);
  607.                         }
  608.  
  609.                         // The custom redirect is found so there is no need to query the rest of array
  610.                         continue;
  611.                     }
  612.                 }
  613.  
  614.                 $redirect_type = (!empty($correct_permalink)) ? 'custom_redirect' : $redirect_type;
  615.             }
  616.  
  617.             // Ignore WP-Content links
  618.             if(!empty($_SERVER['REQUEST_URI']) && (strpos($_SERVER['REQUEST_URI'], '/wp-content') !== false)) { return false; }
  619.  
  620.             /**
  621.              * 1C. Pagination redirect
  622.              */
  623.             if($pagination_redirect && ((isset($wp_query->query_vars['paged']) && $wp_query->query_vars['paged'] == 1) || (isset($wp_query->query_vars['page']) && $wp_query->query_vars['page'] == 1 && !empty($pm_query['endpoint_value'])))) {
  624.                 $pm_query['endpoint'] = $pm_query['endpoint_value'] = '';
  625.                 $wp_query->query_vars['do_not_redirect'] = 0;
  626.             }
  627.  
  628.             /**
  629.              * 1D. Enhance native redirect
  630.              */
  631.             if($canonical_redirect && empty($wp_query->query_vars['do_not_redirect']) && !empty($queried_object) && empty($correct_permalink)) {
  632.  
  633.                 // Affect only posts with custom URI and old URIs
  634.                 if(!empty($queried_object->ID) && isset($permalink_manager_uris[$queried_object->ID]) && empty($wp_query->query['preview'])) {
  635.                     // Ignore posts with specific statuses
  636.                     if(!(empty($queried_object->post_status)) && in_array($queried_object->post_status, array('draft', 'pending', 'auto-draft', 'future'))) {
  637.                         return '';
  638.                     }
  639.  
  640.                     // Check if post type is allowed
  641.                     if(Permalink_Manager_Helper_Functions::is_disabled($queried_object->post_type, 'post_type')) { return ''; }
  642.  
  643.                     // Get the real URL
  644.                     $correct_permalink = get_permalink($queried_object->ID);
  645.                 }
  646.                 // Affect only terms with custom URI and old URIs
  647.                 else if(!empty($queried_object->term_id) && isset($permalink_manager_uris["tax-{$queried_object->term_id}"]) && defined('PERMALINK_MANAGER_PRO')) {
  648.                     // Check if taxonomy is allowed
  649.                     if(Permalink_Manager_Helper_Functions::is_disabled($queried_object->taxonomy, "taxonomy")) { return ''; }
  650.  
  651.                     // Get the real URL
  652.                     $correct_permalink = get_term_link($queried_object->term_id, $queried_object->taxonomy);
  653.                 }
  654.  
  655.                 $redirect_type = (!empty($correct_permalink)) ? 'native_redirect' : $redirect_type;
  656.             }
  657.  
  658.             /**
  659.              * 1E. Old slug redirect
  660.              */
  661.             if($old_slug_redirect && !empty($pm_query['uri']) && empty($wp_query->query_vars['do_not_redirect']) && is_404()) {
  662.                 $slug = basename($pm_query['uri']);
  663.  
  664.                 $post_id = $wpdb->get_var($wpdb->prepare("SELECT post_id from {$wpdb->postmeta} WHERE meta_key = '_wp_old_slug' AND meta_value = %s", $slug));
  665.                 if(!empty($post_id)) {
  666.                     $correct_permalink = get_permalink($post_id);
  667.                     $redirect_type = 'old_slug_redirect';
  668.                 }
  669.             }
  670.  
  671.             /**
  672.              * 2. Check if URL contains duplicated slashes
  673.              */
  674.             if(!empty($old_uri) && ($old_uri != '/') && preg_match('/\/{2,}/', $old_uri)) {
  675.                 $new_uri = ltrim(preg_replace('/([^:])([\/]+)/', '$1/', $old_uri), "/");
  676.                 $correct_permalink = "{$home_url}/{$new_uri}";
  677.             }
  678.  
  679.             /**
  680.              * 3. Prevent redirect loop
  681.              */
  682.             if(!empty($correct_permalink) && is_string($correct_permalink) && !empty($wp->request) && !empty($redirect_type) && $redirect_type !== 'slash_redirect') {
  683.                 $current_uri = trim($wp->request, "/");
  684.                 $redirect_uri = trim(parse_url($correct_permalink, PHP_URL_PATH), "/");
  685.  
  686.                 $correct_permalink = ($redirect_uri == $current_uri) ? null : $correct_permalink;
  687.             }
  688.  
  689.             /**
  690.              * 4. Add endpoints to redirect URL
  691.              */
  692.             if(!empty($correct_permalink) && $endpoint_redirect && ($redirect_type !== 'slash_redirect') && (!empty($pm_query['endpoint_value']) || !empty($pm_query['endpoint']))) {
  693.                 $endpoint_value = $pm_query['endpoint_value'];
  694.  
  695.                 if(empty($pm_query['endpoint']) && is_numeric($endpoint_value)) {
  696.                     $correct_permalink = sprintf("%s/%d", trim($correct_permalink, "/"), $endpoint_value);
  697.                 } else if(isset($pm_query['endpoint']) && !empty($endpoint_value)) {
  698.                     if($pm_query['endpoint'] == 'cpage') {
  699.                         $correct_permalink = sprintf("%s/%s-%s", trim($correct_permalink, "/"), $wp_rewrite->comments_pagination_base, $endpoint_value);
  700.                     } else {
  701.                         $correct_permalink = sprintf("%s/%s/%s", trim($correct_permalink, "/"), $pm_query['endpoint'], $endpoint_value);
  702.                     }
  703.                 } else {
  704.                     $correct_permalink = sprintf("%s/%s", trim($correct_permalink, "/"), $pm_query['endpoint']);
  705.                 }
  706.             }
  707.         } else {
  708.             $queried_object = '-';
  709.         }
  710.  
  711.         /**
  712.          * 5. Check trailing slashes (ignore links with query parameters)
  713.          */
  714.         if($trailing_slashes_mode && $trailing_slashes_redirect && empty($correct_permalink) && empty($_SERVER['QUERY_STRING']) && !empty($_SERVER['REQUEST_URI']) && !is_front_page()) {
  715.             // Check if $old_uri ends with slash or not
  716.             $ends_with_slash = (substr($old_uri, -1) == "/") ? true : false;
  717.             $trailing_slashes_mode = (preg_match("/.*\.([a-zA-Z]{3,4})\/?$/", $old_uri) && $trailing_slashes_mode == 1) ? 2 : $trailing_slashes_mode;
  718.  
  719.             // Ignore empty URIs
  720.             if($old_uri != "/") {
  721.                 // 2A. Force trailing slashes
  722.                 if($trailing_slashes_mode == 1 && $ends_with_slash == false) {
  723.                     $correct_permalink = sprintf("%s/%s/", rtrim($home_url, '/'), trim($old_uri, '/'));
  724.                 }
  725.                 // 2B. Remove trailing slashes
  726.                 else if($trailing_slashes_mode == 2 && $ends_with_slash == true) {
  727.                     $correct_permalink = sprintf("%s/%s", rtrim($home_url, '/'), trim($old_uri, '/'));
  728.                 }
  729.                 // 2C. Remove duplicated trailing slashes
  730.                 else if($trailing_slashes_mode == 1 && preg_match('/[\/]{2,}$/', $old_uri)) {
  731.                     $correct_permalink = sprintf("%s/%s/", rtrim($home_url, '/'), trim($old_uri, '/'));
  732.                 }
  733.             }
  734.  
  735.             $redirect_type = (!empty($correct_permalink)) ? 'slash_redirect' : '-';
  736.         }
  737.  
  738.         /**
  739.          * 6. WWW prefix | SSL mismatch redirect
  740.          */
  741.         if(!empty($permalink_manager_options['general']['sslwww_redirect'])) {
  742.             $home_url_has_www = (strpos($home_url, 'www.') !== false) ? true : false;
  743.             $requested_url_has_www = (strpos($_SERVER['HTTP_HOST'], 'www.') !== false) ? true : false;
  744.             $home_url_has_ssl = (strpos($home_url, 'https') !== false) ? true : false;
  745.             $requested_url_has_ssl = is_ssl();
  746.  
  747.             if(($home_url_has_www !== $requested_url_has_www) || ($home_url_has_ssl !== $requested_url_has_ssl)) {
  748.                 $correct_permalink = "{$home_url}/{$old_uri}";
  749.                 $redirect_type = 'www_redirect';
  750.             }
  751.         }
  752.  
  753.         /**
  754.          * 7. Debug redirect
  755.          */
  756.         $correct_permalink = apply_filters('permalink_manager_filter_redirect', $correct_permalink, $redirect_type, $queried_object);
  757.  
  758.         /**
  759.          * 8. Ignore default URIs (or do nothing if redirects are disabled)
  760.          */
  761.         if(!empty($correct_permalink) && is_string($correct_permalink) && !empty($redirect_mode)) {
  762.             // Allow redirect
  763.             $wp_query->query_vars['do_not_redirect'] = 0;
  764.  
  765.             // Append query string
  766.             $correct_permalink = (!empty($query_string)) ? sprintf("%s?%s", strtok($correct_permalink, "?"), $query_string) : $correct_permalink;
  767.  
  768.             // Adjust trailing slashes
  769.             $correct_permalink = self::control_trailing_slashes($correct_permalink);
  770.  
  771.             wp_safe_redirect($correct_permalink, $redirect_mode, PERMALINK_MANAGER_PLUGIN_NAME);
  772.             exit();
  773.         }
  774.     }
  775.  
  776.     function adjust_canonical_redirect() {
  777.         global $permalink_manager_options, $permalink_manager_uris, $wp, $wp_rewrite;
  778.  
  779.         // Adjust rewrite settings for trailing slashes
  780.         $trailing_slash_setting = (!empty($permalink_manager_options['general']['trailing_slashes'])) ? $permalink_manager_options['general']['trailing_slashes'] : "";
  781.         if(in_array($trailing_slash_setting, array(1, 10))) {
  782.             $wp_rewrite->use_trailing_slashes = true;
  783.         } else if(in_array($trailing_slash_setting, array(2, 20))) {
  784.             $wp_rewrite->use_trailing_slashes = false;
  785.         }
  786.  
  787.         // Get endpoints
  788.         $endpoints = Permalink_Manager_Helper_Functions::get_endpoints();
  789.         $endpoints_array = ($endpoints) ? explode("|", $endpoints) : array();
  790.  
  791.         // Check if any endpoint is called (fix for feed and similar endpoints)
  792.         foreach($endpoints_array as $endpoint) {
  793.             if(!empty($wp->query_vars[$endpoint]) && !in_array($endpoint, array('attachment', 'page', 'paged'))) {
  794.                 $wp->query_vars['do_not_redirect'] = 1;
  795.                 break;
  796.             }
  797.         }
  798.  
  799.         // Do nothing for posts and terms without custom URIs (when canonical redirect is enabled)
  800.         if(is_singular() || is_tax() || is_category() || is_tag()) {
  801.             $element = get_queried_object();
  802.             if(!empty($element->ID)) {
  803.                 $custom_uri = (!empty($permalink_manager_uris[$element->ID])) ? $permalink_manager_uris[$element->ID] : "";
  804.             } else if(!empty($element->term_id)) {
  805.                 $custom_uri = (!empty($permalink_manager_uris["tax-{$element->term_id}"])) ? $permalink_manager_uris["tax-{$element->term_id}"] : "";
  806.             }
  807.         }
  808.  
  809.         if(empty($permalink_manager_options['general']['canonical_redirect'])) {
  810.             remove_action('template_redirect', 'redirect_canonical');
  811.         }
  812.  
  813.         if(empty($permalink_manager_options['general']['old_slug_redirect'])) {
  814.             remove_action('template_redirect', 'wp_old_slug_redirect');
  815.         }
  816.  
  817.         if(!empty($wp->query_vars['do_not_redirect'])) {
  818.             // RankMath
  819.             remove_action('template_redirect', 'do_redirection', 11);
  820.             remove_action('wp', 'do_redirection', 11);
  821.  
  822.             // SEOPress
  823.             remove_action('template_redirect', 'seopress_category_redirect', 1);
  824.  
  825.             remove_action('template_redirect', 'wp_old_slug_redirect');
  826.             remove_action('template_redirect', 'redirect_canonical');
  827.             add_filter('wpml_is_redirected', '__return_false', 99, 2);
  828.             add_filter('pll_check_canonical_url', '__return_false', 99, 2);
  829.         }
  830.     }
  831.  
  832.     /**
  833.      * Case insensitive permalinks
  834.      */
  835.     function case_insensitive_permalinks() {
  836.         global $permalink_manager_options, $permalink_manager_uris;
  837.  
  838.         if(!empty($_SERVER['REQUEST_URI'])) {
  839.             $_SERVER['REQUEST_URI'] = strtolower($_SERVER['REQUEST_URI']);
  840.             $permalink_manager_uris = array_map('strtolower', $permalink_manager_uris);
  841.         }
  842.     }
  843.  
  844. }
  845.  
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