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Detect enabled Apache modules on your own host, with a static .htaccess
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Use case

You have an account at a shared A* (eg. LAMP) hosting provider. You want to know which Apache modules are available so you can use them in a .htaccess.

If the host has mod_php you could simply use the apache_get_modules function.

If not (no PHP, or PHP as CGI), use detect-Apache-modules. detect-Apache-modules makes use of some core Apache configuration available in .htaccess to report which modules are available.


Edit .htaccess to replace:

  • 'http://my-host/apache-modules' with the target base URL
  • '/apache-modules' with the target URL path

Put those files in a directory on the target host:

  • .htaccess
  • list.json
  • list.xhtml
  • ok.txt
  • jquery*.min.js

Open list.html remotely. You'll get the result in your browser.

Updating the probed modules

The list of modules which are probed is static.

This list is in two files which must be in sync

  • .htaccess
  • list.json

If they are not in sync, some modules may be incorrectly reported as not installed, or not reported at all.

To add more modules to the list you can manually modify the files or use setup.php to add modules from an existing host.

Using setup.php


  • a host which has PHP running with mod_php
  • list.json and .htaccess writeable by Apache

Load setup.php from a web browser remotely. The list.json will be read, combined with the local list of installed Apache modules and both list.json and .htaccess files will be updated.

Copyright and license

Copyright 2011 Olivier Mengué

License: Apache License, version 2.0

See LICENSE.txt or

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