From: Rich Bowen mod_include
- documentation. Here are some examples of how one might use this
- construct.
In your configuration file, you could put the following - line:
-
- BrowserMatchNoCase macintosh Mac
- BrowserMatchNoCase MSIE InternetExplorer
-
This will set environment variables ``Mac'' and - ``InternetExplorer'' to true, if the client is running Internet - Explorer on a Macintosh.
- -Then, in your SSI-enabled document, you might do the - following:
-
- <!--#if expr="${Mac} && ${InternetExplorer}" -->
- Apologetic text goes here
- <!--#else -->
- Cool JavaScript code goes here
- <!--#endif -->
-
Not that I have anything against IE on Macs - I just - struggled for a few hours last week trying to get some - JavaScript working on IE on a Mac, when it was working - everywhere else. The above was the interim workaround.
+ documentation. + +For example, if you wish to customize the text on your web page + based on the time of day, you could use the following recipe, placed + in the HTML page:
+ +
+ Good
+ <!--#if expr="%{TIME_HOUR} >=12" -->
+ morning!
+ <!--#else -->
+ afternoon!
+ <!--#endif -->
+
Any other variable (either ones that you define, or normal environment variables) can be used in conditional statements. - With Apache's ability to set environment variables with the + See Expressions in Apache HTTP Server for + more information on the expression evaluation engine.
+ +With Apache's ability to set environment variables with the
SetEnvIf
directives, and other related directives,
- this functionality can let you do some pretty involved dynamic
- stuff without ever resorting to CGI.