Misc variables. Any other variables are prefixed with "HTTP_" and have all '-' converted to '_'. Examples are ACCEPT and the User-Agent headers, which are available as the following variables.
Table A-3. Misc variables
| Variable Name | Description | Format | Example |
|---|---|---|---|
| HTTP_ACCEPT | A string containing a comma-separated list of MIME types which the client will accept. | type/subtype, type/subtype, ... | image/gif, image/jpeg, image/png, ... |
| HTTP_USER_AGENT | The browser which the client is using. | General format: software/version library/version, Common format: software/version extra_info | Mozilla/4.0 (compatible; MSIE 4.01; Windows NT) |