Wrong redirection when installing with URI rewrite

[cfinnberg]

I have a server where the users can build their own WordPress installations. The URL of such installation is like: ​https://example.com/u/user/wpfolder/
The folder on disk is like: /srv/http/public_html_user/wpfolder
But when the user tries to run the installation setup, an automatic redirection leeds to the following incorrect address: ​https://example.com/wpfolder/wp-admin/setup-config.php (notice that /u/user/ is missing)

So:

• REQUEST_URI is '/u/user/wpfolder'
• My document root is '/srv/http/public_html_user/'
• Therefore the document URI (relative to this document root) is '/wpfolder/index.php'
• And the $_SERVER[PHP_SELF] value is '/wpfolder/index.php'

I have found that the problem comes from the wp_guess_url function in wp-includes/functions.php file (line 6218):

<?php
...
                } elseif ( $script_filename_dir . '/' === $abspath_fix ) {
                        // Strip off any file/query params in the path.
                        $path = preg_replace( '#/[^/]*$#i', '', $_SERVER['PHP_SELF'] );

                } else {
...

I'm not sure am I missing something, but in my opinion path should use REQUEST_URI:

<?php
                } elseif ( $script_filename_dir . '/' === $abspath_fix ) {
                        // Strip off any file/query params in the path.
                        $path = preg_replace( '#/[^/]*$#i', '', $_SERVER['REQUEST_URI'] );

                } else {

This only occurs if a rewrite of the URI has happened, as in my case.

[jorbin]

Hi @cfinnberg, welcome to WordPress Trac.

This code was introduced in [25396] as a part of 3.7 so updating the version to match.