If Shortcode

This plugin provides an [if] shortcode to conditionally render content. The syntax is the following:

[if condition1 condition2=false condition3]{content}[/if]

Conditions are passed as attribute names. Multiple conditions evaluate to the result of ORing all of them. In other words, if at least one condition evaluates to the desired boolean result, {content} is rendered, otherwise it is discarded.
Attribute values determine if we want the condition to be true or false. A value of '0', 'false', '' (the empty string), 'null' or 'no' means we expect the condition to be false. Anything else, including the absense of a value, is interpreted as true.

For example, suppose that we want to include a sentence in a post, but only for anonymous visitors:

[if is_user_logged_in=no]The Sentence.[/if]

It…