XSSI if and else statements

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.