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The Custom Field Widget displays values of custom field keys, allowing post- and page-specific meta sidebar content with limitless applications.
Custom Field Widget is for WordPress 2.6.x and features:
<ul>
<li>Multiple widget instances possible</li>
<li>Widget-specific optional title and text</li>
<li>Conditional functionality, i.e., without a matching key, the widget is not displayed</li>
<li>Practically unlimited possible uses</li>
</ul>
<h3>Use</h3>
If you are unfamiliar with custom fields, you should first read about them on the <a href="https://codex.wordpress.org/Using_Custom_Fields" title="Using Custom Fields - WordPress Codex" rel="nofollow ugc">WordPress Codex</a>.
Custom fields are added to posts and pages from the Write > Page and Write > Post menus, just below the main editor area. You may add as many custom fields to a post/page as you like.
There are two separate fields for each custom field: the key and its value. The Custom Field Widget finds a specified key and then displays its corresponding value in the sidebar. Without a matching key, nothing is displayed.
The Custom Field Widget doesn’t necessarily ‘do’ anything, but it enables an advanced (and often overlooked) feature built-in to WordPress. For example, see <a href="http://performancing.com/wordpress-tips/jazz-your-site-28-ways-use-wordpress-custom-fields" title="Jazz Up Your Site: 28 Ways To Use WordPress Custom Fields" rel="nofollow ugc">28 Ways to Use WordPress Custom Fields</a> for a small picture of possibilities.
I developed this plugin for my own use. I wanted to display a small table of contents for certain pages (which are without categories) in the sidebar dynamically. Without a widget, I would have to edit the sidebar file(s) for each theme I used.
Because each table of contents (a short <code>ol</code> of items) varied from page to page, it also had to be specific to each page. So I created a custom field key of <code>toc</code> and added the <code>ol</code> of items to its value. Enabling the plugin, I had a table of contents appear in the sidebar for each page with a custom field key of <code>toc</code>.
The uses and applications of WordPress custom fields are infinite. Just <a href="http://www.google.com/search?q=wordpress+custom+fields" title="Google Search: wordpress custom fields" rel="nofollow ugc">search for WordPress custom fields</a> for thousands of results on this subject.
<h3>License</h3>
Custom Field Widget, a plugin for WordPress, (C) 2008 by Scott Allan Wallick, is licensed under the <a href="http://www.gnu.org/licenses/gpl.html" title="GNU General Public License" rel="nofollow ugc">GNU General Public License</a>.
Custom Field Widget is free software: you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version.
Custom Field Widget is distributed in the hope that it will be useful, but without any warranty; without even the implied warranty of merchantability or fitness for a particular purpose. See the GNU General Public License for more details.
You should have received a copy of the GNU General Public License along with Custom Field Widget. If not, see <a href="http://www.gnu.org/licenses/" title="GNU General Public Licenses" rel="nofollow ugc">http://www.gnu.org/licenses/</a>.

Custom Field Widget

The good thing about small and simple plugins, is that they are robust :)

Still works (Wordpress 4.4)

The Custom Field Widget displays values of custom field keys, allowing post- and page-specific meta sidebar content with limitless applications.

athenaofdelphi

The Advanced Custom Field Widget is an extension of the Custom Field Widget by Scott Wallick, and displays values of custom field keys, allowing post- and page-specific meta sidebar content.
For detailed information about this plugin and how it works, check out it’s wiki page at <a href="http://athena.outer-reaches.com/wiki/doku.php?id=projects:acfw:home" rel="nofollow ugc">Athena’s Wiki</a>.
For more information about Scott’s orginal Custom Field Widget, check out <a href="http://www.plaintxt.org/experiments/custom-field-widget/" rel="nofollow ugc">plaintxt.org</a>.
<h3>License</h3>
Advanced Custom Field Widget, a plugin for WordPress, (C) 2008-10 by Christina Louise Warne (based on Custom Field Widget, a plugin for WordPress, (C) 2008 by Scott Allan Wallick, licensed under the <a href="http://www.gnu.org/licenses/gpl.html" title="GNU General Public License" rel="nofollow ugc">GNU General Public License</a>), is licensed under the <a href="http://www.gnu.org/licenses/gpl.html" title="GNU General Public License" rel="nofollow ugc">GNU General Public License</a>.
Advanced Custom Field Widget is free software: you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version.
Advanced Custom Field Widget is distributed in the hope that it will be useful, but without any warranty; without even the implied warranty of merchantability or fitness for a particular purpose. See the GNU General Public License for more details.
You should have received a copy of the GNU General Public License along with Advanced Custom Field Widget. If not, see <a href="http://www.gnu.org/licenses/" title="GNU General Public Licenses" rel="nofollow ugc">http://www.gnu.org/licenses/</a>.

Advanced Custom Field Widget

The Advanced Custom Field Widget is an extension of the Custom Field Widget by Scott Wallick, and displays values of custom field keys.

Custom Field Widget vs Advanced Custom Field Widget