How To Create Custom Post Type WordPress Plugin

In WordPress, post and page represent contents for website. Taxonomy are categories for posts. You can create your won custom post type with plugin.

Some codes which we will use :

• register_post_type
• register_taxonomy
• add_filter, single_template, taxonomy_template

Code to create custom post type

function wporg_custom_post_type()
{
    register_post_type('wporg_product',
                       array(
                           'labels'      => array(
                               'name'          => __('Products'),
                               'singular_name' => __('Product'),
                           ),
                           'public'      => true,
                           'has_archive' => true,
                           'rewrite'     => array( 'slug' => 'products' ), // my custom slug
                       )
    );
}
add_action('init', 'wporg_custom_post_type');

Code to create taxonomy

function wporg_register_taxonomy_course()
{
    $labels = [
        'name'              => _x('Courses', 'taxonomy general name'),
		'singular_name'     => _x('Course', 'taxonomy singular name'),
		'search_items'      => __('Search Courses'),
		'all_items'         => __('All Courses'),
		'parent_item'       => __('Parent Course'),
		'parent_item_colon' => __('Parent Course:'),
		'edit_item'         => __('Edit Course'),
		'update_item'       => __('Update Course'),
		'add_new_item'      => __('Add New Course'),
		'new_item_name'     => __('New Course Name'),
		'menu_name'         => __('Course'),
		];
	$args = [
		'hierarchical'      => true, // make it hierarchical (like categories)
		'labels'            => $labels,
		'show_ui'           => true,
		'show_admin_column' => true,
		'query_var'         => true,
		'rewrite'           => ['slug' => 'course'],
	];
	register_taxonomy('course', ['wporg_product'], $args);
}
add_action('init', 'wporg_register_taxonomy_course');

if you want to use template in plugin folder :

add_filter('single_template','your_single_template_function');
add_filter( 'taxonomy_template','your_taxonomy_template_function');

Here is the full code and don’t forget to change permalink after you activate the plugin, otherwise it will show 404 page :

<?php
/*
Plugin Name: ZZ Custom Post
Plugin URI: http://www.wpamanuke.com
Description: Sample Custom Post
Version: 1.0.1
Author: WPAmaNuke
Author URI: https://wpamanuke.com
*/

define( 'ZZ_PRODUCT_DIR' , plugin_dir_path( __FILE__ ) );
function wporg_custom_post_type()
{
    register_post_type('wporg_product',
                       array(
                           'labels'      => array(
                               'name'          => __('Products'),
                               'singular_name' => __('Product'),
                           ),
                           'public'      => true,
                           'has_archive' => true,
                           'rewrite'     => array( 'slug' => 'products' ), // my custom slug
                       )
    );
}
add_action('init', 'wporg_custom_post_type');


/* Filter the single_template with our custom function*/
add_filter('single_template', 'my_custom_template');


function my_custom_template($single) {

    global $post;

    /* Checks for single template by post type */
    if ( $post->post_type == 'wporg_product' ) {
        if ( file_exists( ZZ_PRODUCT_DIR . '/single.php' ) ) {
            return ZZ_PRODUCT_DIR . '/single.php';
        }
    }

    return $single;

}


function wporg_register_taxonomy_course()
{
    $labels = [
        'name'              => _x('Courses', 'taxonomy general name'),
		'singular_name'     => _x('Course', 'taxonomy singular name'),
		'search_items'      => __('Search Courses'),
		'all_items'         => __('All Courses'),
		'parent_item'       => __('Parent Course'),
		'parent_item_colon' => __('Parent Course:'),
		'edit_item'         => __('Edit Course'),
		'update_item'       => __('Update Course'),
		'add_new_item'      => __('Add New Course'),
		'new_item_name'     => __('New Course Name'),
		'menu_name'         => __('Course'),
		];
	$args = [
		'hierarchical'      => true, // make it hierarchical (like categories)
		'labels'            => $labels,
		'show_ui'           => true,
		'show_admin_column' => true,
		'query_var'         => true,
		'rewrite'           => ['slug' => 'course'],
	];
	register_taxonomy('course', ['wporg_product'], $args);
}
add_action('init', 'wporg_register_taxonomy_course');

function my_custom_archive( $template ) {
	 $mytemplate = ZZ_PRODUCT_DIR . '/archive.php';

    if( is_tax( 'course') && is_readable( $mytemplate ) )
        $template =  $mytemplate;

    return $template;
}
add_filter( 'taxonomy_template', 'my_custom_archive');

single.php

<?php
$args = [
    'post_type'      => 'wporg_product',
    'posts_per_page' => 10,
];
$loop = new WP_Query($args);
while ($loop->have_posts()) {
    $loop->the_post();
    ?>
    <div class="entry-content">
        <?php the_title(); ?>
        <?php the_content(); ?>
    </div>
    <?php
}

archive.php

<?php
$args = [
    'post_type'      => 'wporg_product',
    'posts_per_page' => 10,
];
$loop = new WP_Query($args);
while ($loop->have_posts()) {
    $loop->the_post();
    ?>
    <div class="entry-content">
        <a href="<?php the_permalink(); ?>" title=""><?php the_title(); ?></a>
        <?php the_content(); ?>
    </div>
    <?php
}