I freshly installed a WordPress site and I configured it behind a reverse proxy with site URL - http://example.com/hello


I can reach the admin dashboard page, however I cannot go further as the link becomes http://example.com/wp-admin instead of http://example.com/hello/wp-admin. How could I get rid of this weird behaviour?

Details that might help...

  1. I am quite sure that the WordPress Address (URL) and Site Address (URL) are configured as http://example.com/hello, I even checked the database table wp_options.
  2. When it arrives the admin dashboard page with correct CSS, the browser will show the correct link for half seconds and suddenly change to the wrong one. I even checked the network log in my Chrome and Firefox, the requested URL is http://example.com/hello/wp-admin.
  3. I have tried to configure the .htaccess as well, but no luck.

    # BEGIN WordPress
    <IfModule mod_rewrite.c>
    RewriteEngine On
    RewriteBase /hello
    RewriteRule ^index\.php$ - [L]
    RewriteCond %{REQUEST_FILENAME} !-f
    RewriteCond %{REQUEST_FILENAME} !-d
    RewriteRule . /hello/index.php [L]
    # END WordPress

3 Answers 3


Eventually, I found the reason of this weird behaviour.

It is caused by the JavaScript embedded in wp_admin_canonical_url() (https://developer.wordpress.org/reference/functions/wp_admin_canonical_url/)

The URL is determined by this piece of code


where the latter one returns wp-admin instead of hello/wp-admin.

By manipulating the value in $_SERVER['REQUEST_URI'], I can successfully get the correct behaviour in admin dashboard. But I still hope for an elegant solution without touching WordPress code.

add_filter('set_url_scheme', 'hacky_uri_fix', 10, 2);
function hacky_uri_fix($url, $scheme) {
    if ( $url === {{BAD ADMIN URL}} ) {
        $url = {{CORRECT ADMIN URL}}
    return $url

should work, just replace the bad URL you are trying to avoid with the correct one. I'm sure there's a better solution to this out there but I'm not super familiar with subfolder installs and this should work without touching core code.


Victor is 100%, so save the next person (maybe even myself) work digging further:

  • the function wp_admin_canonical_url is in the ./wp-admin/includes/misc.php file
  • Change


to be


Where /news can be anything you have as a path in front of the wp-admin folder.

  • Please don't ever edit core files. This is bad and will break if you update Wordpress (which you should be doing for security updates at the minimum)
    – mrben522
    Jan 10, 2019 at 19:54
  • Then what is the path forward? My whole site including all of the admin panels work great EXCEPT for the left hand panel. It cuts off the "/news" path. You can neg my answer and his find as well. but until something else "core" comes along and works this is a VALID. WORKING. work around.
    – Chad
    Jan 10, 2019 at 20:19
  • Follow that function down the rabbit hole until you find a filter you can hook on to. I think the hook you're looking for is gonna be set_url_scheme
    – mrben522
    Jan 10, 2019 at 20:30

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