plugin development - Change cannonical URL after changing url with add_rewrite_rule()

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So, I'm making a plugin for some niche application for my customer which involves a table with data, and I created a page within the plugin to show more in-depth information about the table row.

This is how I'm making the rewrite:

function mytableplugin_page_rewrite(){
 $page_slug = 'mytablepluginpage';

 // urls will be in the form
 // /your-page/42/

 add_rewrite_rule(
     'mytableplugin/([0-9a-zA-Z_-]+)/?$',
     'index.php?pagename=' . $page_slug . '&tid=$matches[1]',
     'top'
 );
}

But the redirect doesn't affect the canonical URL, so every "mytableplugin" page has the same "mytablepluginpage" canonical URL

I'm not using Yoast SEO plugin, and I don't want my plugin to depend on it, so, how can I change the canonical link of the page? I want the custom name (mytableplugin != mytablepluginpage) to be kept and the argument to keep on the canonical URL

It's being a problem because the TranslatePress plugin is using the wrong URL when switching languages, it's throwing me back into the "mytablepluginpage" page that has no content without the queries.

Edit: I tried some more stuff, and hijacking the rel_canonical function does work to change the canonical URL, but doesn't solve the problem of the translatepress plugin having the wrong URL for the language switching, here's the code I used:

remove_action('wp_head', 'rel_canonical');
add_action('wp_head', 'my_rel_canonical');

function my_rel_canonical() {
    if (is_page('mytablepluginpage')) {
        
        global $wp;
        echo "<link rel='canonical' href='".home_url( $wp->request )."'/>\n";
        
    } else {
        rel_canonical();
    }
}

(This last code came from this StackOverflow question)

Thanks in advance!

So, I'm making a plugin for some niche application for my customer which involves a table with data, and I created a page within the plugin to show more in-depth information about the table row.

This is how I'm making the rewrite:

function mytableplugin_page_rewrite(){
 $page_slug = 'mytablepluginpage';

 // urls will be in the form
 // /your-page/42/

 add_rewrite_rule(
     'mytableplugin/([0-9a-zA-Z_-]+)/?$',
     'index.php?pagename=' . $page_slug . '&tid=$matches[1]',
     'top'
 );
}

But the redirect doesn't affect the canonical URL, so every "mytableplugin" page has the same "mytablepluginpage" canonical URL

I'm not using Yoast SEO plugin, and I don't want my plugin to depend on it, so, how can I change the canonical link of the page? I want the custom name (mytableplugin != mytablepluginpage) to be kept and the argument to keep on the canonical URL

It's being a problem because the TranslatePress plugin is using the wrong URL when switching languages, it's throwing me back into the "mytablepluginpage" page that has no content without the queries.

Edit: I tried some more stuff, and hijacking the rel_canonical function does work to change the canonical URL, but doesn't solve the problem of the translatepress plugin having the wrong URL for the language switching, here's the code I used:

remove_action('wp_head', 'rel_canonical');
add_action('wp_head', 'my_rel_canonical');

function my_rel_canonical() {
    if (is_page('mytablepluginpage')) {
        
        global $wp;
        echo "<link rel='canonical' href='".home_url( $wp->request )."'/>\n";
        
    } else {
        rel_canonical();
    }
}

(This last code came from this StackOverflow question)

Thanks in advance!

• plugin-development
• url-rewriting
• rel-canonical

Share Improve this question edited Sep 24, 2020 at 16:12 Miguel Vieira asked Sep 24, 2020 at 2:33 Miguel VieiraMiguel Vieira 1344 bronze badges

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1 Answer 1

Sorted by: Reset to default 0

Okay, I found a way to do it, if someone ever need to create a permalink or change a permalink for a virtual page or a dynamic page, here's how:

The get_permalink(), the_permalink() and get_the_permalink() functions may be filtered by using the post_type_link, page_link and/or post_link filters, each one of these is for one kind of post.

This is the function I ended up with:

function mytableplugin_rename_permalink($url, $post) {
    
    $table = get_page_by_path('mytablepluginpage');
    global $wp;
    
    if ( 'integer' === gettype( $post ) ) {
        $post_id = $post;
    } else {
        $post_id = $post->ID;
    }

    
    // check if we are targetting the plugin page
    if (  $table->ID == $post_id ) {
        $url = home_url( $wp->request );
    }
    
    apply_filters( 'mytableplugin', home_url( $wp->request ), get_the_ID(), false );

    // Return the value of the URL
    return $url;
}

add_filter( 'post_type_link', 'mytableplugin_rename_permalink', 10, 2 );
add_filter( 'page_link', 'mytableplugin_rename_permalink', 10, 2 );
add_filter( 'post_link', 'mytableplugin_rename_permalink', 10, 2 );

I didn't have to add all the three filters, but I did as to avoid any problems if I ever change the post type of the page in the plugin.

I got the code for making it work from this page and this question

It fixed the canonical URL, the permalink and the translatePress problems.

本文标签： plugin developmentChange cannonical URL after changing url with addrewriterule()