authors, admins (advanced)
Using the (:if:) Directive
The (:if:) directive allows portions of a page to be included or excluded from processing. The generic form of the (:if:) directive is
(:if cond param:) body (:ifend:)
where “cond” names a condition to be tested (described below), and “param” is a parameter or other argument to the condition.
The built-in conditions include:
(:if name [name]:) - current page is named “name”
(:if auth [level]:) - viewer is authorized at “level”
(:if authid:) - current viewer is authenticated
(:if true:) - always include text
(:if false:) - always exclude text (same as a comment)
(:if attachments:) - current page has attachments
Negated forms of conditions also work
(:if !attachments:) This page has no attachments
Any (:if:) automatically terminates the previous one, thus markup can be easily cased:
(:if auth read:)* You can read
(:if auth edit:)* You can edit
(:if auth upload:)* You can upload
(:ifend:)
admins (advanced)
Creating new conditions
See Cookbook:ConditionalMarkupSamples.
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