%a | Remote IP address. |
%A | Local IP address. |
%b | Bytes sent, excluding HTTP headers. This is shown in Apache's Combined Log Format (CLF). For a request without any data content, a - is shown instead of 0. |
%B | Bytes sent, excluding HTTP headers. |
%{VARIABLE}e | The contents of the environment variable variable. |
%f | The filename of the output log. |
%h | Remote host. |
%H | Request protocol. |
%{HEADER}i | The contents of header; header line(s) in the request sent to the server. |
%l | Remote log name (from identd, if supplied). |
%m | Request method. |
%{NOTE}n | The contents of note NOTE from another module. |
%{HEADER}o | The contents of header; header line(s) in the reply. |
%p | The canonical port of the server serving the request. |
%P | The process ID of the child that serviced the request. |
%q | The contents of the query string, prepended with a ? character. If there's no query string, this evaluates to an empty string. |
%r | The first line of request. |
%s | Status. For requests that were internally redirected, this is the status of the original request — %>s for the last. |
%t | The time, in common log time format. |
%{format}t | The time, in the form given by format, which should be in strftime(3) format. |
%T | The seconds taken to serve the request. |
%u | Remote user from auth; this might be bogus if the return status (%s) is 401. |
%U | The URL path requested. |
%V |
