<p>This replaces your standard custom post meta form. Allows extension of page, post and custom post type by allowing you to create customised post form fields when adding or editing post types.</p>
<p>This is typically for developers to extend your typical post and post type form. You can use get_post_meta function in your theme template  to display the saved data.</p>


WP Extra Fields

Allows extension of page, post and custom post type by allowing you to create customised form fields to include when adding or editing post types.

Matt Gibbs

<p>Custom Field Suite (CFS) lets you add custom fields to your posts. It’s lightweight and battle-tested (there’s not much to break).</p>
<h4>Things to know</h4>
<ul>
<li>We do not provide support.</li>
<li>This is a free plugin. We’re not selling anything.</li>
<li>CFS includes 14 <a href="https://mgibbs189.github.io/custom-field-suite/field-types.html" rel="nofollow ugc">field types</a>. There are no plans to add more.</li>
<li>If you want all the bells-and-whistles, use ACF.</li>
</ul>
<h4>Field types</h4>
<ul>
<li>Text</li>
<li>Textarea</li>
<li>WYSIWYG</li>
<li>Date</li>
<li>Color</li>
<li>True / False</li>
<li>Select</li>
<li>File Upload</li>
<li>Relationship</li>
<li>Term</li>
<li>User</li>
<li>Loop (repeatable fields)</li>
<li>Hyperlink</li>
<li>Tab (group fields)</li>
</ul>
<h4>Usage</h4>
<ul>
<li>Browse to the “Field Groups” admin menu</li>
<li>Create a Field Group containing one or more custom fields</li>
<li>Choose where the Field Group should appear, using the Placement Rules box</li>
<li>Use the <a href="https://mgibbs189.github.io/custom-field-suite/api/get.html" rel="nofollow ugc">get</a> method in your template files to display custom fields</li>
</ul>
<h4>Links</h4>
<ul>
<li><a href="https://mgibbs189.github.io/custom-field-suite/" rel="nofollow ugc">Documentation <span aria-hidden="true" class="wp-exclude-emoji">→</span></a></li>
<li><a href="https://github.com/mgibbs189/custom-field-suite" rel="nofollow ugc">Github <span aria-hidden="true" class="wp-exclude-emoji">→</span></a></li>
</ul>


Custom Field Suite

CFS()->get() - не работает, возвращает пустой массив, CFS()->get() === array()
по Id работает

WP Extra Fields vs Custom Field Suite