phpinfo() page in Plesk does not open when SEO-safe 301 redirect is enabled: Unable to retrieve information about the PHP configuration

Symptoms

• Permanent SEO-safe 301 redirect from HTTP to HTTPS is enabled in domain's Hosting Settings.

  Or:

  Rewrite rules for domain redirect from existing files, i.e. the following is defined in '.htaccess' file:

  CONFIG_TEXT: <IfModule mod_rewrite.c>
  RewriteEngine On
  RewriteRule ^test.php$ - [L]
  RewriteRule . /test.php [L]
  </IfModule>

• When clicking View the phpinfo() page at Domains > example.com > PHP Settings, Plesk shows the following error message:

  PLESK_ERROR: Unable to retrieve information about the PHP configuration

  Or:

  One of the website pages is shown.

Cause

This is a Plesk bug with ID #PPPM-5027, which will be fixed in future product updates.

Resolution

Until the fix is available, use one of the following workarounds:

1. Log into Plesk.

2. Temporarily disable the Permanent SEO-safe 301 redirect from HTTP to HTTPS option in Domains > example.com > Hosting Settings when checking phpinfo() through the PHP Settings page.

3. Temporarily remove Additional Apache Directives in Domains > example.com > Apache and Nginx Settings.

4. Temporarily rename .htaccess file in Domains > example.com > File Manager.

5. Click View the phpinfo() page at Domains > example.com > PHP Settings.

Alternatively, create phpinfo() page manually:

Note: rewrites should not block the access to the created file.

1. Log into Plesk.

2. Go to Domains > example.com > File Manager.

3. Click New > Create File and name it phpinfo.php. Click OK.

4. Open the file phpinfo.php and add the following content in it:

   CONFIG_TEXT: <?php
   phpinfo();
   ?>

5. Open the URL http://example.com/phpinfo.php in a browser to view the phpinfo page.

Additional info

A website hosted in Plesk is not accessible: open_basedir restriction in effect
Unable to open phpinfo() in Plesk when custom Modsecurity rules are in use: Unable to retrieve information about the PHP configuration
Unable to open phpinfo() in Plesk: Error: Unable to retrieve information about the PHP configuration