You can use SSI to select a specific day, and then carry out an action. You can also determine that action to be carried out at a certain time on that day.

1. First configure the time format to the day of the year
   <!–#config timefmt=”%j” –>
2. Then use an SSI to select a specific day
   <!–#if expr=”($DATE_LOCAL = /75/)” –>
   This will select the 15 March in 2012
3.  You can use SSI to select a number of days.
   <!–#if expr=”($DATE_LOCAL = /75/)||($DATE_LOCAL = /76/)||($DATE_LOCAL = /77/)||($DATE_LOCAL = /78/)||($DATE_LOCAL = /79/)||($DATE_LOCAL = /80/)||($DATE_LOCAL = /81/)” –>
   This will select from day 75 through to day 81
4. You can also select a specific time within this day
   <!–#if expr=”${DATE_LOCAL} = /296/ “–>
   <!–#if expr=”((${DATE_LOCAL} > 2961659) && (${DATE_LOCAL} < 2961901)) “–>
   This will look at day number 296, and then carry out the command for the time from 1659 local time to 1901 local time based on the server.

if statement

<!--#if expr="\"$HTTP_REFERER\" = /abc.net.au/" -->
Content relevant to that site

<!--#elif expr="\"$HTTP_REFERER\" = /google.com/" -->
An ‘or if’ statement

<!--#else -->
this else statement is used for all other instances

<!--#endif -->
finalise the code with an ‘end statement’

More complex if statement – SSI conditional based on document URI

This depends on the URI of the document being referenced.

Set the variable giving it a value
<!--#set var='site' value='brisbane'--'>

In normal use add the variable as an echo
<!--#echo var='site'-->

If used within another ssi statement use the ‘$’ parameter
<--#include virtual='/${site}/include.htm'-->