Apache apache_lookup_uri Perform a partial request for the specified URI and return all info about it class apache_lookup_uri string filename This performs a partial request for a URI. It goes just far enough to obtain all the important information about the given resource and returns this information in a class. The properties of the returned class are: status the_request status_line method content_type handler uri filename path_info args boundary no_cache no_local_copy allowed send_bodyct bytes_sent byterange clength unparsed_uri mtime request_time Note: apache_lookup_uri only works when PHP is installed as an Apache module apache_note Get and set apache request notes string apache_note string note_name string note_value apache_note is an Apache-specific function which gets and sets values in a request's notes table. If called with one argument, it returns the current value of note note_name. If called with two arguments, it sets the value of note note_name to note_value and returns the previous value of note note_name. getallheaders Fetch all HTTP request headers array getallheaders This function returns an associative array of all the HTTP headers in the current request. You can also get at the value of the common CGI variables by reading them from the environment, which works whether or not you are using PHP as an Apache module. Use phpinfo to see a list of all of the environment variables defined this way. $headers = getallheaders(); while (list($header, $value) = each($headers)) { echo "$header: $value<br>\n"; } This example will display all the request headers for the current request. getallheaders is currently only supported when PHP runs as an Apache module. virtual Perform an Apache sub-request int virtual string filename virtual is an Apache-specific function which is equivalent to <!--#include virtual...--> in mod_include. It performs an Apache sub-request. It is useful for including CGI scripts or .shtml files, or anything else that you would parse through Apache. Note that for a CGI script, the script must generate valid CGI headers. At the minimum that means it must generate a Content-type header. For PHP files, you need to use include or require; virtual cannot be used to include a document which is itself a PHP file..