This plugin will create a sitemap for your WordPress site (http://example.com/sitemap.xml). This was originally created for a multi-site setup, but it works fine on a single site install as well. There is no ‘User Interface’ to speak of with this plugin, just drop in place.

You may also download this code via it’s github repository:

• Version: 1.0

First, create a file named sitemap-generator.php in your mu-plugins directory, (or your plugins directory if your using a single install WordPress setup) and past the below into it.

<?php
/*
Plugin Name: Sitemap Generator
Plugin URI: http://technology.mattrude.com/2011/10/07/wordpress-sitemap-generator-plugin/
Description: Automatic generate standard XML sitemap (http://example.com/sitemap.xml) that supports the protocol including Google, Yahoo, MSN, Ask.com, and others. No files stored on your disk, the sitemap.xml file is generate as needed, like your feeds.
Version: 1.0
Author: Matt Rude
Author URI: http://mattrude.com/
*/

function sitemap_flush_rules() {
        global $wp_rewrite;
        $wp_rewrite-&gt;flush_rules();
}

add_action('init', 'sitemap_flush_rules');

function xml_feed_rewrite($wp_rewrite) {
        $feed_rules = array(
                '.*sitemap.xml$' =&gt; 'index.php?feed=sitemap'
        );

        $wp_rewrite-&gt;rules = $feed_rules + $wp_rewrite-&gt;rules;
}

add_filter('generate_rewrite_rules', 'xml_feed_rewrite');

function do_feed_sitemap() {
        $template_dir = dirname(__FILE__) . '/templates';
        load_template( $template_dir . '/feed-sitemap.php' );
}

add_action('do_feed_sitemap', 'do_feed_sitemap', 10, 1);

?>

Next, create a new directory named templates and past the below in a file named feed-sitemap.php in it.

<?php
/*
Plugin Name: Sitemap Generator
Plugin URI: http://technology.mattrude.com/projects/sitemap-wp-plugin/
Description: Automatic generate standard XML sitemap (http://example.com/sitemap.xml) that supports the protocol including Google, Yahoo, MSN, Ask.com, and others. No files stored on your disk, the sitemap.xml file is generate as needed, like your feeds.
Version: 1.1
Author: Matt Rude
Author URI: http://mattrude.com/
*/

function sitemap_flush_rules() {
        global $wp_rewrite;
        $wp_rewrite->flush_rules();
}

add_action('init', 'sitemap_flush_rules');

function sitemap_no_trailing_slash( $redirect_url ) {
    if ( is_feed() && strpos( $redirect_url, 'sitemap.xml/' ) !== FALSE )
		return;

    return $redirect_url;
}
add_filter( 'redirect_canonical', 'sitemap_no_trailing_slash' );

function xml_feed_rewrite($wp_rewrite) {
        $feed_rules = array(
                '.*sitemap.xml$' => 'index.php?feed=sitemap'
        );

        $wp_rewrite->rules = $feed_rules + $wp_rewrite->rules;
}

add_filter('generate_rewrite_rules', 'xml_feed_rewrite');

function do_feed_sitemap() {
        $template_dir = dirname(__FILE__) . '/templates';
        load_template( $template_dir . '/feed-sitemap.php' );
}

add_action('do_feed_sitemap', 'do_feed_sitemap', 10, 1);

?>

Next, create a new directory named templates and past the below in a file named feed-sitemap.php in it.

<?php
/**
 * XML Sitemap Feed Template for displaying XML Sitemap Posts feed.
 */

//header('Content-Type: text/xml; charset=' . get_option('blog_charset'), true);

echo '<?xml version="1.0" encoding="'.get_option('blog_charset').'"?'.'>'; ?>

<urlset xmlns="http://www.sitemaps.org/schemas/sitemap/0.9"
        xmlns:image="http://www.google.com/schemas/sitemap-image/1.1">

        <!-- Main Site -->

        <url>
                <loc><?php bloginfo_rss('url') ?></loc>
                <lastmod><?php echo mysql2date('Y-m-dTH:i:sZ', get_lastpostmodified('GMT'), false); ?></lastmod>
                <changefreq>daily</changefreq>
                <priority>0.8</priority>
        </url>

        <!-- Site Pages -->

<?php
        $args = array(
                'post_type' => 'page',
                'numberposts' => 100,
                'status' => 'publish',
                'orderby' => 'date',
                'order' => 'DESC'
        );
        $post_ids = get_posts($args);

        if ($post_ids) {
                foreach ($post_ids as $post) { ?>
        <url>
                <loc><?php the_permalink_rss() ?></loc>
                <lastmod><?php echo mysql2date('Y-m-dTH:i:sZ', get_post_time('Y-m-d H:i:s', true), false); ?></lastmod>
                <changefreq>monthly</changefreq>
                <priority>0.7</priority>
        </url>
<?php
 } }
?>

        <!-- Site Posts -->

<?php
        $args = array(
                'post_type' => 'post',
                'numberposts' => 100,
                'post_status' => 'publish',
                'orderby' => 'date',
                'order' => 'DESC'
        );
        $post_ids = get_posts($args);

        if ($post_ids) {
                foreach ($post_ids as $post) { ?>
        <url>
                <loc><?php the_permalink_rss() ?></loc>
                <lastmod><?php echo mysql2date('Y-m-dTH:i:sZ', get_post_time('Y-m-d H:i:s', true), false); ?></lastmod>
                <changefreq>monthly</changefreq>
                <priority>0.5</priority>
<?php
        $args2 = array(
                'post_type' => 'attachment',
                'numberposts' => 200,
                'post_parent' => $post->ID,
                'post_mime_type' => 'image',
                'orderby' => 'date',
                'order' => 'DESC'
        );
        $images = get_posts($args2);
        if ($images) {
                foreach ($images as $post) { ?>
                <image:image>
                        <image:loc><?php echo wp_get_attachment_url(); ?></image:loc>
<?php if ( !empty($post->post_excerpt) ) echo '                 <image:caption>' . esc_html($post->post_excerpt, 1) . '</image:caption>
'; ?>
                        <image:title><?php echo esc_html($post->post_title, 1) ?></image:title>
                </image:image>
<?php } } ?>
        </url>
<?php
                }
        }
?>
</urlset>