custompost-stock-toolkit.php

<?php 
/*
Plugin Name: Stock Toolkit
*/


add_action( 'init', 'stock_theme_custom_post' );
function stock_theme_custom_post() {
    register_post_type( 'testimonial',
        array(
            'labels' => array(
								'name'          => __( 'Testimonials' ),
								'singular_name' => __( 'Testimonial' )
            ),
						'supports' => array('title', 'editor', 'thumbnail', 'page-attributes'),
						'public'   => false,
						'show_ui'  => true,

        )
    );
}


function post_list_shortcode($atts){
    extract( shortcode_atts( array(
				'count' => -1,
				'type'  => 'post',
    ), $atts) );
     
    $q = new WP_Query(
        array('posts_per_page' => $count, 'post_type' => $type)
        );
         
    $list = '<div>';
    while($q->have_posts()) : $q->the_post();
        $idd = get_the_ID();
        $post_content = get_the_content();
        $thumbnail = get_the_post_thumbnail_url( $post->ID, 'thumbnail' );
        $list .= '
        <div>
        <ul>
        <li><img src="'.$thumbnail.'"></li>
        <li><a href="'.get_permalink().'">'.get_the_title().'</li>
        <li>'.$post_content.'</li>
        </ul></div>
        ';        
    endwhile;
    $list.= '</div>';
    wp_reset_query();
    return $list;
}
add_shortcode('post_list', 'post_list_shortcode');  

?>