Programming PHP

un under IIS, you will need to reimplement that functionality. Following are the
Apache-specific functions and some solutions for replacing them:
getallheaders( )
Fetch all HTTP request headers. You can access the HTTP request headers via
the predefined variable $HTTP_ENV_VARS instead of using this function for any web
server, including Apache.
virtual( )
Perform an Apache subrequest. This function allows you to include a URI from
the local web server in the PHP script. If the retrieved text includes a PHP script,
that script will become part of your current script.
apache_lookup_uri( )
Perform a partial request for the specified URI and return all information about
it. This function requests Apache to provide information about a URI. No conversion
is available for IIS.
apache_note( )
Get and set Apache request notes. This function is used for communication
between Apache plug-ins. No conversion is available for IIS.
ascii2ebcdic( ) and ebcdic2ascii( )
These functions translate strings to and from ASCII and EBCDIC. Apache must
be compiled with EBCDIC support for these functions to work. PHP provides no
other means of converting EBCDIC strings. Microsoft provides a C-based API to
handle EBCDIC translations.
There is also a set of IIS-specific functions, though its purpose is primarily for management
of IIS.
Remote Files
Under Unix, PHP is able to retrieve remote files via HTTP or FTP for inclusion in
your script via the require( ) and include( ) functions. These functions are not available
under Windows. Instead, you must write your own subroutine to fetch the
remote file, save it to a temporary local file, and then include that file, as shown in
Example 15-1.
Example 15-1. Including a remote file with PHP on Windows