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[1] [CITE@en[mod_rewrite - Apache HTTP Server Version 2.5]]
([TIME[2017-08-18 17:24:45 +09:00]])
<https://httpd.apache.org/docs/trunk/mod/mod_rewrite.html#RewriteCond>
]FIGCAPTION]

> REQUEST_FILENAME
> The full local filesystem path to the file or script matching the request, if this has already been determined by the server at the time REQUEST_FILENAME is referenced. Otherwise, such as when used in virtual host context, the same value as REQUEST_URI. Depending on the value of AcceptPathInfo, the server may have only used some leading components of the REQUEST_URI to map the request to a file.

]FIG]