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19.29. mod_setenvif
The mod_setenvif module sets environment variables based on the client's browser or other information.
| BrowserMatch |
BrowserMatch regex var[=value] var[=value] ...
[server config]
Sets environment variables based on the client's browser type. If the User-Agent HTTP header matches the regular expression specified by regex, set one or more environment variables as follows:
- var
- The environment variable is defined and given the value of 1.
- !var
- The environment variable is deleted.
- var=value
- The environment variable is set to an initial value.
Here is an example of how to locate various browsers. The first sets compatible if the client is connecting with Versions 2 through 4 of Netscape. The second sets microsoft if Internet Explorer is detected:
BrowserMatch ^Mozilla/[2-4] compatible !microsoft BrowserMatch MSIE microsoft
| BrowserMatchNoCase |
BrowserMatchNoCase regex var=value var=value ...
[server config]
Identical to BrowserMatch, except that matching is now case-insensitive. For example, the following would still work to detect Internet Explorer:
BrowserMatch msie microsoft
| SetEnvIf |
SetEnvIf attribute regex var[=value] var[=value]
[server config]
Sets environment variables based on the attributes of an HTTP request. Some of the more common attributes are:
- Remote_Host
- The hostname of the client, if known
- Remote_Addr
- The IP address of the client
- Remote_User
- The user which is making the request, if known
- Request_Method
- The name of the HTTP method being used to request information
- Request_URI
- The latter portion of the URL, after the host information
- Referer
- The URI of the referring page, if known
For example, the following sets the environment variable SOMEONE_FROM_OREILLY if the remote host resolves to the domain oreilly.com:
SetEnvIf Remote_Host oreilly.com SOMEONE_FROM_OREILLY
| SetEnvIfNoCase |
SetEnvIfNoCase attribute regex var[=value] var[=value]
[server config]
Identical to SetEnvIf, except that attribute matching is now case-insensitive.
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| 19.28. mod_rewrite |  | 19.30. mod_so |
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