vectorarrow

<h4>Features</h4>
Dynamic Content — Insert live data into any block using a simple template syntax: <code>{{ post.title }}</code>, <code>{{ user.name }}</code>, <code>{{ site.name }}</code>. No shortcodes, no PHP templates, no code.
Personalization — Greet visitors by name, show role-specific content, or display custom messages based on login status. Expressions are evaluated server-side on every page load.
Visibility Control — Show or hide any Gutenberg block based on conditions. Display content only for logged-in users, specific roles, or specific post states — all configured from the block sidebar.
Dynamic CSS Classes — Inject CSS classes into any block based on live data. Style blocks differently for administrators vs. guests, published vs. draft posts, and more.
20+ Built-in Filters — Transform values with chainable pipes: <code>upper</code>, <code>lower</code>, <code>truncate</code>, <code>date</code>, <code>default</code>, <code>match</code>, <code>replace</code>, <code>kebab</code>, and more. Chain them: <code>{{ post.title | upper | truncate 20 }}</code>.
Custom Fields — Access any post or user meta with <code>post.meta.my_field</code> or <code>user.meta.my_field</code>. Sensitive keys are blocked by default.
Full Expression Language — Arithmetic, comparison, ternary, logical operators, string interpolation, and bracket access. All evaluated server-side with zero frontend JavaScript.
In-Editor Autocomplete — Typing <code>{{</code> triggers smart autocomplete with categorized suggestions, icons, and live previews.
Extensible — Register custom data roots, custom filters, and custom autocomplete suggestions via WordPress hooks and JavaScript filters.
For complete syntax reference, filter documentation, and developer guides, visit the <a href="https://vectorarrow.com/docs/" rel="nofollow ugc">full documentation</a>.
<h4>How It Works</h4>
Add an expression to any block’s text content by typing <code>{{</code> and selecting your expression from the autocomplete menu. The plugin will automatically format it as an expression chip.
<pre><code>{{ post.title }}
{{ user.name | default "Guest" }}
{{ post.date | date "F j, Y" }}
{{ user.is_logged_in ? "Welcome back!" : "Hello, visitor!" }}
</code></pre>
Expressions are rendered as interactive chips in the editor and resolved server-side on every page render. No JavaScript runs on the frontend.
For the full syntax guide, data roots, and filter reference, see the <a href="https://vectorarrow.com/docs/" rel="nofollow ugc">documentation</a>.
<h4>Source Code</h4>
The full, uncompressed source code is publicly available on <a href="https://github.com/samuel-reinhardt/Vector-Expressions" rel="nofollow ugc">GitHub</a>.

Vector Expressions

Embed dynamic expressions in the Gutenberg block editor to personalize content and control block visibility.

geomagas

This plugin provides an [if] shortcode to conditionally render content. The syntax is the following:
<pre><code>[if condition1 condition2=false condition3]{content}[/if]
</code></pre>
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 <code>'0'</code>, <code>'false'</code>, <code>''</code> (the empty string), <code>'null'</code> or <code>'no'</code> 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:
<pre><code>[if is_user_logged_in=no]The Sentence.[/if]
</code></pre>
It also provides an [else] shortcode and an [eitherway] one for use inside [if] blocks. [else] will render its content if the condition evaluates to false, and [eitherway] will render its content regardless of the evaluation result. 
When used outside an [if] block, these shortcodes behave as if the whole content is surrounded by an [if] shortcode whose condition evaluates to true. In other words, an [else] shortcode would not render any content, while a [eitherway] one would. You can use as many of these shortcodes as you like in a single [if] block, which gives you the ability to do things like:
<pre><code> - Am I logged in?
 [if is_user_logged_in]- Yes you are.
 [else]- No you are not.
 [/else][eitherway]- I'm sorry, what?
 [/eitherway]- I said YOU A-R-E LOGGED IN!!!
 [else]- YOU ARE NOT LOGGED IN!!! What's the matter with you?[/else][/if]
</code></pre>
A multitude of conditions are supported out-of-the-box. The following evaluate to the result of the corresponding <a href="https://developer.wordpress.org/themes/basics/conditional-tags/" rel="nofollow ugc">WordPress Conditional Tag</a>, using the no-parameter syntax:
<pre><code> is_single
 is_singular
 is_page
 is_home
 is_front_page
 is_privacy_policy
 is_attachment
 is_category
 is_tag
 is_tax
 is_author
 is_archive
 is_year
 is_month
 is_date
 is_day
 is_time
 is_feed
 is_search
 is_sticky
 is_preview
 has_term
 has_excerpt
 comments_open
 pings_open
 is_404
 is_user_logged_in
 is_super_admin
 is_multi_author
 is_multisite
 is_main_site
 is_child_theme
</code></pre>
For example, the evaluation of the <code>is_page</code> condition is equivalent to calling <code>is_page()</code> with no parameter.
<h3>Extending</h3>
The functionality of the plugin can be extended by other plugins, by means of adding custom conditions through filters. To add a custom condition, a filter hook must be defined in the following manner:
<pre><code>add_filter($if_shortcode_filter_prefix.'my_condition','my_condition_evaluator');

function my_condition_evaluator($value) {
 $evaluate=.... /* add your evaluation code here */
 return $evaluate;
}
</code></pre>
Then, you can use your custom condition like so:
<pre><code>[if my_condition]{content}[/if]
</code></pre>
A big thanks to M Miller for the <a href="http://wordpress.stackexchange.com/a/123073/39275" rel="nofollow ugc"><code>normalize_empty_atts()</code></a> function.

If Shortcode

This plugin provides an [if] shortcode to conditionally render content.

Vector Expressions vs If Shortcode