Simple 301 Redirects

expand_redirects(); ?>

Request		Destination
example: /about.htm		example: /about/
	»		Delete

/> Use Wildcards?

Documentation

Simple Redirects

Simple redirects work similar to the format that Apache uses: the request should be relative to your WordPress root. The destination can be either a full URL to any page on the web, or relative to your WordPress root.

Example

Request: /old-page/
Destination: /new-page/

Wildcards

To use wildcards, put an asterisk (*) after the folder name that you want to redirect.

Example

Request: /old-folder/*
Destination: /redirect-everything-here/

You can also use the asterisk in the destination to replace whatever it matched in the request if you like. Something like this:

Example

Request: /old-folder/*
Destination: /some/other/folder/*

Or:

Request: /old-folder/*/content/
Destination: /some/other/folder/*

*/ function expand_redirects() { $redirects = get_option('301_redirects'); $output = ''; if (!empty($redirects)) { foreach ($redirects as $request => $destination) { $output .= ' » '; } } // end if return $output; } /** * save_redirects function * save the redirects from the options page to the database * @access public * @param mixed $data * @return void */ function save_redirects($data) { if ( !current_user_can('manage_options') ) { wp_die( 'You do not have sufficient permissions to access this page.' ); } check_admin_referer( 'save_redirects', '_s301r_nonce' ); $data = $_POST['301_redirects']; $redirects = array(); for($i = 0; $i < sizeof($data['request']); ++$i) { $request = trim( sanitize_text_field( $data['request'][$i] ) ); $destination = trim( sanitize_text_field( $data['destination'][$i] ) ); if ($request == '' && $destination == '') { continue; } else { $redirects[$request] = $destination; } } update_option('301_redirects', $redirects); if (isset($data['wildcard'])) { update_option('301_redirects_wildcard', 'true'); } else { delete_option('301_redirects_wildcard'); } } /** * redirect function * Read the list of redirects and if the current page * is found in the list, send the visitor on her way * @access public * @return void */ function redirect() { // this is what the user asked for (strip out home portion, case insensitive) $userrequest = str_ireplace(get_option('home'),'',$this->get_address()); $userrequest = rtrim($userrequest,'/'); $redirects = get_option('301_redirects'); if (!empty($redirects)) { $wildcard = get_option('301_redirects_wildcard'); $do_redirect = ''; // compare user request to each 301 stored in the db foreach ($redirects as $storedrequest => $destination) { // check if we should use regex search if ($wildcard === 'true' && strpos($storedrequest,'*') !== false) { // wildcard redirect // don't allow people to accidentally lock themselves out of admin if ( strpos($userrequest, '/wp-login') !== 0 && strpos($userrequest, '/wp-admin') !== 0 ) { // Make sure it gets all the proper decoding and rtrim action $storedrequest = str_replace('*','(.*)',$storedrequest); $pattern = '/^' . str_replace( '/', '\/', rtrim( $storedrequest, '/' ) ) . '/'; $destination = str_replace('*','$1',$destination); $output = preg_replace($pattern, $destination, $userrequest); if ($output !== $userrequest) { // pattern matched, perform redirect $do_redirect = $output; } } } elseif(urldecode($userrequest) == rtrim($storedrequest,'/')) { // simple comparison redirect $do_redirect = $destination; } // redirect. the second condition here prevents redirect loops as a result of wildcards. if ($do_redirect !== '' && trim($do_redirect,'/') !== trim($userrequest,'/')) { // check if destination needs the domain prepended if (strpos($do_redirect,'/') === 0){ $do_redirect = home_url().$do_redirect; } header ('HTTP/1.1 301 Moved Permanently'); header ('Location: ' . $do_redirect); exit(); } else { unset($redirects); } } } } // end funcion redirect /** * getAddress function * utility function to get the full address of the current request * credit: http://www.phpro.org/examples/Get-Full-URL.html * @access public * @return void */ function get_address() { // return the full address return $this->get_protocol().'://'.$_SERVER['HTTP_HOST'].$_SERVER['REQUEST_URI']; } // end function get_address function get_protocol() { // Set the base protocol to http $protocol = 'http'; // check for https if ( isset( $_SERVER["HTTPS"] ) && strtolower( $_SERVER["HTTPS"] ) == "on" ) { $protocol .= "s"; } return $protocol; } // end function get_protocol } // end class Simple301Redirects } // end check for existance of class // instantiate $redirect_plugin = new Simple301Redirects(); if (isset($redirect_plugin)) { // add the redirect action, high priority add_action('init', array($redirect_plugin,'redirect'), 1); // create the menu add_action('admin_menu', array($redirect_plugin,'create_menu')); // if submitted, process the data if (isset($_POST['301_redirects'])) { add_action('admin_init', array($redirect_plugin,'save_redirects')); } } // this is here for php4 compatibility if(!function_exists('str_ireplace')){ function str_ireplace($search,$replace,$subject){ $token = chr(1); $haystack = strtolower($subject); $needle = strtolower($search); while (($pos=strpos($haystack,$needle))!==FALSE){ $subject = substr_replace($subject,$token,$pos,strlen($search)); $haystack = substr_replace($haystack,$token,$pos,strlen($search)); } $subject = str_replace($token,$replace,$subject); return $subject; } }