(PHP 5 >= 5.1.0, PHP 7) Reset the Apache write timer

(PHP 4 >= 4.3.2, PHP 5, PHP 7) Fetch Apache version

(PHP 4, PHP 5, PHP 7) Fetch all HTTP request headers

(PHP 4 >= 4.3.0, PHP 5, PHP 7) Fetch all HTTP response headers

(PHP 4 >= 4.3.2, PHP 5, PHP 7) Get a list of loaded Apache modules

(PHP 4 >= 4.2.0, PHP 5, PHP 7) Set an Apache subprocess_env variable

(PHP 4, PHP 5, PHP 7) Perform a partial request for the specified URI and return all info about it

(PHP 4 >= 4.3.0, PHP 5, PHP 7) Get an Apache subprocess_env variable

(PHP 4, PHP 5, PHP 7) Perform an Apache sub-request

(PHP 4, PHP 5, PHP 7) Get and set apache request notes