HelgaTheViking

I found I constantly needed a way for clients to mark a post as something they wanted to feature and I’ve never found sticky posts particularly inuitive and the UI is pretty hidden for new users. The simplest solution was a checkbox in prominently located metabox.
Please note that this plugin, by itself, will not change how your posts are displayed. It just gives the UI to users and a meta key to theme developers to query for.
<h4>Usage</h4>
This plugin simply adds a <code>_featured</code> meta key to every post with a value of <code>yes</code> for featured items and <code>no</code> for everything else. Actual display of the featured items is entirely up to the theme developer, but an example ( place in your template where you’d like to display a list of featured “Portfolios”) might be as follows:
<pre><code>// params for our query
$args = array(
 'post_type' => 'portfolio',
 'posts_per_page' => 5,
 'meta_key' => '_featured',
 'meta_value' => 'yes'
);

// The Query
$featured_portfolios = new WP_Query( $args );

// The Loop
if ( $featured_portfolios ) :

 echo '<ul class="featured">';

 while ( $featured_portfolios->have_posts() ) :
 $featured_portfolios->the_post();
 echo '<li>' . get_the_title() . '</li>';
 endwhile;

 echo '</ul>';

else :

 echo 'No featured portfolios found.';

endif;

/* Restore original Post Data
 * NB: Because we are using new WP_Query we aren't stomping on the
 * original $wp_query and it does not need to be reset.
*/
wp_reset_postdata();
</code></pre>
Multiple queries per page load can slow down your site so it is worthwhile to take advantage of the <a href="https://codex.wordpress.org/Transients_API" rel="nofollow ugc">Transients API</a>, so an alternate usage would be:
<pre><code>// Get any existing copy of our transient data
if ( false === ( $featured_portfolios = get_transient( 'featured_portfolios' ) ) ) {
 // It wasn't there, so regenerate the data and save the transient

 // params for our query
 $args = array(
 'post_type' => 'portfolio',
 'posts_per_page' => 5,
 'meta_key' => '_featured',
 'meta_value' => 'yes'
 );

 // The Query
 $featured_portfolios = new WP_Query( $args );

 // store the transient
 set_transient( 'featured_portfolios', $featured_portfolios );

}

// Use the data like you would have normally...

// The Loop
if ( $featured_portfolios ) :

 echo '<ul class="featured">';

 while ( $featured_portfolios->have_posts() ) :
 $featured_portfolios->the_post();
 echo '<li>' . get_the_title() . '</li>';
 endwhile;

 echo '</ul>';

else :

 echo 'No featured portfolios found.';

endif;

/* Restore original Post Data
 * NB: Because we are using new WP_Query we aren't stomping on the
 * original $wp_query and it does not need to be reset.
*/
wp_reset_postdata();
</code></pre>
Then to ensure that your featured posts list is updated, add a function to your theme’s functions.php to delete the transient when a portfolio (in this example) post type is saved.
<pre><code>// Create a function to delete our transient when a portfolio post is saved
function save_post_delete_featured_transient( $post_id ) {
 if ( 'portfolio' == get_post_type( $post_id ) )
 delete_transient( 'featured_portfolios' );
}
// Add the function to the save_post hook so it runs when posts are saved
add_action( 'save_post', 'save_post_delete_featured_transient' );
</code></pre>
Simple queries should only need the <code>meta_key</code> and <code>meta_value</code> parameters, but if you need something more advanced then you might want to read about how to use the more <a href="http://scribu.net/wordpress/advanced-metadata-queries.html" rel="nofollow ugc">complex Meta Query parameters</a>.
<h4>Support</h4>
Support is handled in the <a href="https://wordpress.org/support/plugin/featured-item-metabox" rel="ugc">WordPress forums</a>. Please note that support is limited and does not cover any custom implementation of the plugin.
Please report any bugs, errors, warnings, code problems at <a href="https://github.com/helgatheviking/Featured-Item-Metabox/issues" rel="nofollow ugc">Github</a>

Featured Item Metabox

Quickly add a metabox to any post type for marking a post as featured.  Toggle featured status even more quickly from the posts lists/ quick edit scre …

PureDevs

ympervej86

Have you ever wanted to inspect the metadata associated with a post? 
PureDevs Any Meta Inspector is a free, lightweight plugin that allows you to — 
Inspect meta keys of posts, pages, custom post type posts, custom taxonomy terms, users and comments 
Inspect unserialized values of posts, pages, custom post type posts, custom taxonomy terms, users and comments

PureDevs Any Meta Inspector


The plugin is excellent, it helps me a lot in development because I exclusively deal with theme and plugin programming. Keep it up!


Great plugin!

PureDevs Any Meta Inspector shows all the meta keys and their unserialized values in a metabox for posts, pages, terms, comments, and users.

Featured Item Metabox vs PureDevs Any Meta Inspector