These variables are not request-specific, and are set for all requests.
Table A-1. Always set
| Variable Name | Description | Format | Example |
|---|---|---|---|
| SERVER_SOFTWARE | Name and version of the web server software. | "name/version" | "NCSA/1.5.2" |
| SERVER_NAME | The hostname of the web server; in lieu of the hostname, an IP address will be given. | ||
| GATEWAY_INTERFACE | The revision of the CGI Interface with which the web server complies. | "CGI/revision" | "CGI/1.1" |
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| CGI-based image selection. | Request Specific |