Name

RewriteCond

Synopsis

RewriteCond TestString 
                     CondPattern
Server config, virtual host, directory

One or more RewriteCond directives can precede a RewriteRule directive to define conditions under which it is to be applied. CondPattern is a regular expression matched against the value retrieved for TestString, which contains server variables of the form %{ NAME_OF_VARIABLE }, where NAME_OF_VARIABLE can be one of the following list:

API_VERSION

PATH_INFO

SERVER_PROTOCOL

AUTH_TYPE

QUERY_STRING

SERVER_SOFTWARE

DOCUMENT_ROOT

REMOTE_ADDR

THE_REQUEST

ENV:any_environment_variable

REMOTE_HOST

TIME

HTTP_ACCEPT

REMOTE_USER

TIME_DAY

HTTP_COOKIE

REMOTE_IDENT

TIME_HOUR

HTTP_FORWARDED

REQUEST_FILENAME

TIME_MIN

HTTP_HOST

REQUEST_METHOD

TIME_MON

HTTP_PROXY_CONNECTION

REQUEST_URI

TIME_SEC

HTTP_REFERER

SCRIPT_FILENAME

TIME_WDAY

HTTP_USER_AGENT

SERVER_ADMIN

TIME_YEAR

HTTP:any_HTTP_header

SERVER_NAME

IS_SUBREQ

SERVER_PORT

These variables all correspond to the similarly named HTTP MIME headers, C variables of the Apache server, or the current time. If the regular expression does not match, the RewriteRule following it does not apply.

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