Casey Bisson

This is a convenience class and collection of methods to make creating new custom post types with their own metaboxes easy.
The general idea is to define a function that’s hooked to the <code>register_post_types</code> action. The function defines a class for your post type that extends the <code>GO_Cpt</code> class. This follows a design pattern established by the modern widgets API (as introduced in WP 2.8) https://codex.wordpress.org/Widgets_API#Developing_Widgets .
The result is a new custom post type and much easier creation and updating of custom meta associated with that post type. You’ll also have a convenient object you can use to access the metadata associated with each post.
<pre><code>function my_customposttype() { class My_CustomPostType extends GO_Cpt { function __construct() { // execute the parent constructor with the name 
 // and definition for the custom post type parent::__construct( $post_type_name , $post_type_definition ); } function metabox( $post , $meta ) { // print out the form here // 
 // this method is optional, only use it if you want to 
 // add a metabox to your custom post type } function update( $new_meta , $old_meta ) { // sanitize and validate the metadata // then return $meta so it can be saved // // this method is required if a 
 // metabox() method is included } } global $my_customposttype; $my_customposttype = new My_CustomPostType; } // hook that function to the register_post_types action add_action( 'register_post_types' , 'my_customposttype' ); </code></pre>
Backstory: defining the post type class inside the function avoids issues with loading order and fatal errors resulting from attempting to extend a class that might not exist yet. Isn’t PHP awesome?
See the included hello world example: https://plugins.trac.wordpress.org/browser/go-cptfactory/trunk/example-helloworld-cpt.php
To access the meta associated with a post, you can call <code>$my_customposttype->get_meta( $post_id );</code>
You can easily add a method and hook to filter <code>the_content</code> or <code>the_excerpt</code> to insert custom values that may have been entered in the post meta. Simply add <code>add_filter( 'the_content' , array( $this , 'the_content' ));</code> in the <code>__construct()</code> and then define another method in the <code>My_CustomPostType</code> class such as:`
<pre><code> function the_content( $content ) { 
 $meta_print = print_r( $this->get_meta( get_the_ID() ) , TRUE ); 
 return $meta_print . $content 
 } </code></pre>
`

GigaOM Custom Post Type Factory

Makes defining custom post types as easy as creating a widget. Includes example code to get you started.

Meitar

Add a seedbank (or seed library) to your WordPress-powered website. Registered users can post seed offers and requests (called “seed exchange posts”) for others to search, making it easier to swap seeds and grow your community. Try the <a href="http://wordpress-seedbank-plugin.cyberbusking.org/" rel="nofollow ugc">live demo</a> yourself.
Some key Features include:
<ul>
<li>Customize numerous metadata fields to suit your specific community’s needs.</li>
<li>Import a comma-separated values file to create seed exchange postings in batches.</li>
<li>Search, filter, and sort through seed exchanges with a detailed heads-up display of available postings.</li>
<li>Available in multiple languages, including:
<ul>
<li>Swedish (<code>sv_SE</code>)</li>
<li>Italian (<code>it_IT</code>)</li>
<li>Hindi (<code>hi_IN</code>)</li>
</ul>
</li>
</ul>
Want WP-SeedBank in your language? <a href="https://www.transifex.com/signup/contributor/?next=/projects/p/wp-seedbank/" rel="nofollow ugc">Join our team of translators</a>!
<h4>Quick start guide</h4>
Follow these steps to get your seed exchange website up and running quickly:
<ol>
<li>Install WordPress on your website, if you haven’t already. (You can use <a href="https://codex.wordpress.org/Installing_WordPress#Famous_5-Minute_Install" rel="nofollow ugc">WordPress’s Famous 5-Minute Install instructions</a>.)</li>
<li>Install the WP-Seedbank plugin. (You can use <a href="https://codex.wordpress.org/Managing_Plugins#Installing_Plugins" rel="nofollow ugc">WordPress’s Automatic Plugin Installation</a> instructions, or the WordPress Beginner “<a href="http://www.wpbeginner.com/beginners-guide/step-by-step-guide-to-install-a-wordpress-plugin-for-beginners/" rel="nofollow ugc">Step by Step Guide to Install a WordPress Plugin for Beginners</a>” instructions.)</li>
<li>Enable user registration from your <a href="https://codex.wordpress.org/Settings_General_Screen" rel="nofollow ugc">WordPress General Settings screen</a> by checking the box that reads “Anyone can register.” This allows the people in your community to make user accounts on your website and use the WP-Seedbank software.
<ol>
<li>Set New User Default Role to Contributor. This enables the people in your community who have made user accounts to create seed exchange posts and submit them for your review to publish.</li>
</ol>
</li>
<li>Share the Web address (URL) of your website with your community and invite them to join.</li>
<li>Periodically check your website for seed exchange posts created by members of your community, review, and publish them. (The same process that you use for <a href="https://codex.wordpress.org/Writing_Posts" rel="nofollow ugc">reviewing and publishing regular posts applies here</a>.)</li>
<li>Optionally, you can promote members of your community who have created seed exchange posts in the past to the Author role, so that they no longer need your approval to publish seed exchange posts. Learn more about <a href="https://codex.wordpress.org/Roles_and_Capabilities" rel="nofollow ugc">WordPress’s user roles and capabilities</a>.</li>
</ol>
See also:
<ul>
<li><a href="http://maymay.net/blog/2014/01/23/wp-seedbank-plugin-a-mini-users-guide/" rel="nofollow ugc">WP-SeedBank plugin: a mini user’s guide</a></li>
</ul>
<h3>Credits</h3>
The WP-Seedbank plugin could not have been possible without the generosity of the Team Hummingbird Project volunteers at <a href="http://clevelandgivecamp.org/" rel="nofollow ugc">Cleveland GiveCamp</a>. Special thanks to:
<ul>
<li><a href="http://meitarmoscovitz.com/" rel="nofollow ugc">Meitar Moscovitz</a>, <a href="http://Cyberbusking.org" rel="nofollow ugc">Cyberbusking.org</a></li>
<li>Alex Redinger</li>
<li>Kip Price</li>
</ul>
Maintaining this plugin is a volunteer, community effort, and a labor of love for the original development team. However, if you like it, please consider <a href="https://npo.justgive.org/nonprofits/donate.jsp?ein=45-3043080" rel="nofollow ugc">donating to The Hummingbird Project</a>, <a href="http://www.amazon.com/gp/redirect.html?ie=UTF8&location=http%3A%2F%2Fwww.amazon.com%2Fs%3Fie%3DUTF8%26redirect%3Dtrue%26sort%3Drelevancerank%26search-type%3Dss%26index%3Dbooks%26ref%3Dntt%255Fathr%255Fdp%255Fsr%255F2%26field-author%3DMeitar%2520Moscovitz&tag=maymaydotnet-20&linkCode=ur2&camp=1789&creative=390957" rel="nofollow ugc">purchasing one of Meitar’s web development books</a>, or <a href="http://Cyberbusking.org/" rel="nofollow ugc">contributing to Meitar’s Cyberbusking fund</a>. Your support makes continued development possible!

WP-Seedbank

The WP-SeedBank plugin turns any self-hosted WordPress blog into a community seedbank (or seed library). :D

GigaOM Custom Post Type Factory vs WP-Seedbank