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I like to hardcode everything on my WordPress websites, without using any plugins. Is there any way to generate or update my sitemap everytime I publish/update a post on one of my Multisite blogs, without using plugins?

  • 1
    You realize that there is no real difference between "hardcode" and a plugin besides the fact the plugins are portable and thus easier to work with? – Wyck Jan 20 '12 at 18:53
  • 3
    Downvote for the "without a Plugin" restriction. – Chip Bennett Feb 20 '12 at 17:47
  • Not wanting to add ANOTHER plugin on a CLIENT site is perfectly acceptable for such a simple task. It's true the code is the same but perhaps the OP didn't know that – JasonDavis May 23 '13 at 3:45
  • as chip said it is a pointless question, in addition, doing a sitemap code that will not break the site when it is generated, is not trivial and good answer will not fit the format of the site – Mark Kaplun May 25 '17 at 7:10
1

I don't know whether this works on multisite, but it is working perfect in a single WordPress installation for me.

When you create/update any posts, or pages, it will generate a sitemap.xml file and update the links (URLs) with the most recent first (last modified).

Copy and paste the below code in your active theme's functions.php file:

/* function to create sitemap.xml file in root directory of site  */        
// add_action("publish_post", "eg_create_sitemap");
// add_action("publish_page", "eg_create_sitemap");  
add_action( "save_post", "eg_create_sitemap" );   
function eg_create_sitemap() {
    $postsForSitemap = get_posts( array(
        'numberposts' => -1,
        'orderby'     => 'modified',
        'post_type'   => array( 'post', 'page' ),
        'order'       => 'DESC'
    ) );
    $sitemap = '<?xml version="1.0" encoding="UTF-8"?>';
    $sitemap .= "\n" . '<urlset xmlns="http://www.sitemaps.org/schemas/sitemap/0.9">' . "\n";    
    foreach( $postsForSitemap as $post ) {
        setup_postdata( $post );   
        $postdate = explode( " ", $post->post_modified );   
        $sitemap .= "\t" . '<url>' . "\n" .
            "\t\t" . '<loc>' . get_permalink( $post->ID ) . '</loc>' .
            "\n\t\t" . '<lastmod>' . $postdate[0] . '</lastmod>' .
            "\n\t\t" . '<changefreq>monthly</changefreq>' .
            "\n\t" . '</url>' . "\n";
    }     
    $sitemap .= '</urlset>';     
    $fp = fopen( ABSPATH . "sitemap.xml", 'w' );
    fwrite( $fp, $sitemap );
    fclose( $fp );
}
  • I don't think that's going to work on multisite - it's writing sitemap.xml to the same file location on the server, so there would only be 1 actual sitemap.xml file that would get overwritten whenever any blog makes a change... – Sators May 19 '17 at 18:50
  • querying all the posts in the site on each save is a sure way to bring down a site which has non trivial amount of content. in addition it will make save new posts slower and slower with every published post – Mark Kaplun May 25 '17 at 7:14
0

Before using the code provided in w3uiguru's answer, I had to make some improvements that follow the accepted standard for XML files. The code is below:

/* function to create sitemap.xml file in root directory of site  */
// add_action("publish_post", "eg_create_sitemap");
// add_action("publish_page", "eg_create_sitemap");
add_action( "save_post", "eg_create_sitemap" );
function eg_create_sitemap() {
    if ( str_replace( '-', '', get_option( 'gmt_offset' ) ) < 10 ) { 
        $tempo = '-0' . str_replace( '-', '', get_option( 'gmt_offset' ) ); 
    } else { 
        $tempo = get_option( 'gmt_offset' ); 
    }
    if( strlen( $tempo ) == 3 ) { $tempo = $tempo . ':00'; }
    $postsForSitemap = get_posts( array(
        'numberposts' => -1,
        'orderby'     => 'modified',
        'post_type'   => array( 'post', 'page' ),
        'order'       => 'DESC'
    ) );
    $sitemap .= '<?xml version="1.0" encoding="UTF-8"?>' . '<?xml-stylesheet type="text/xsl" href="' . 
        esc_url( home_url( '/' ) ) . 'sitemap.xsl"?>';
    $sitemap .= "\n" . '<urlset xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://www.sitemaps.org/schemas/sitemap/0.9 http://www.sitemaps.org/schemas/sitemap/0.9/sitemap.xsd" xmlns="http://www.sitemaps.org/schemas/sitemap/0.9">' . "\n";
    $sitemap .= "\t" . '<url>' . "\n" .
        "\t\t" . '<loc>' . esc_url( home_url( '/' ) ) . '</loc>' .
        "\n\t\t" . '<lastmod>' . date( "Y-m-d\TH:i:s", current_time( 'timestamp', 0 ) ) . $tempo . '</lastmod>' .
        "\n\t\t" . '<changefreq>daily</changefreq>' .
        "\n\t\t" . '<priority>1.0</priority>' .
        "\n\t" . '</url>' . "\n";
    foreach( $postsForSitemap as $post ) {
        setup_postdata( $post);
        $postdate = explode( " ", $post->post_modified );
        $sitemap .= "\t" . '<url>' . "\n" .
            "\t\t" . '<loc>' . get_permalink( $post->ID ) . '</loc>' .
            "\n\t\t" . '<lastmod>' . $postdate[0] . 'T' . $postdate[1] . $tempo . '</lastmod>' .
            "\n\t\t" . '<changefreq>Weekly</changefreq>' .
            "\n\t\t" . '<priority>0.5</priority>' .
            "\n\t" . '</url>' . "\n";
    }
    $sitemap .= '</urlset>';
    $fp = fopen( ABSPATH . "sitemap.xml", 'w' );
    fwrite( $fp, $sitemap );
    fclose( $fp );
}
  • 2
    Could you please explain your code and file an edit to reformat it for readability? Thanks – kaiser Jun 23 '14 at 0:10
  • @locutor-antonio-cezar @gabriel You need to change the Weekly to weekly because of Error 1840: Element '{http://www.sitemaps.org/schemas/sitemap/0.9}changefreq': [facet 'enumeration'] The value 'Weekly' is not an element of the set {'always', 'hourly', 'daily', 'weekly', 'monthly', 'yearly', 'never'}. – Iurie Malai Aug 7 '15 at 21:28
2

The following code works right off the bat. Your sitemap will show up on: https://your-website-name.com/sitemap.xml

Every time you create or update a page, post or custom post type it will show. Make sure to add the name of your custom post type:

add_action( 'publish_post', 'ow_create_sitemap' );
add_action( 'publish_page', 'ow_create_sitemap' );
add_action( 'save_post',    'ow_create_sitemap' );

function ow_create_sitemap() {
    $postsForSitemap = get_posts(array(
        'numberposts' => -1,
        'orderby'     => 'modified',
        // 'custom_post' should be replaced with your own Custom Post Type (one or many)
        'post_type'   => array( 'post', 'page', 'custom_post' ),
        'order'       => 'DESC'
    ));

    $sitemap = '<?xml version="1.0" encoding="UTF-8"?>';
    $sitemap .= '<urlset xmlns="http://www.sitemaps.org/schemas/sitemap/0.9" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://www.sitemaps.org/schemas/sitemap/0.9 http://www.sitemaps.org/schemas/sitemap/0.9/sitemap.xsd">';

    foreach( $postsForSitemap as $post ) {
        setup_postdata( $post );

        $postdate = explode( " ", $post->post_modified );

        $sitemap .= '<url>'.
                    '<loc>' . get_permalink( $post->ID ) . '</loc>' .
                    '<lastmod>' . $postdate[0] . '</lastmod>' .
                    '<changefreq>monthly</changefreq>' .
                    '</url>';
      }

    $sitemap .= '</urlset>';

    $fp = fopen( ABSPATH . 'sitemap.xml', 'w' );

    fwrite( $fp, $sitemap );
    fclose( $fp );
}

protected by Community Jan 27 at 5:09

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