WP CPT Custom Columns

wp-cpt-custom-column.php

<?php 
/*
  File: WP Custom Columns Extension
  Author: Gkiokan Sali 
  Date: 25.07.2018
*/


class CustomColumn {

    public static $post_type = 'Foo';

    public function __construct(){
        add_filter('manage_'. self::$post_type . '_posts_columns', [$this, 'posts_columns'], 15);
        add_action('manage_'. self::$post_type . '_posts_custom_column', [$this, 'posts_custom_columns'], 1, 2);
        add_filter('manage_edit-'. self::$post_type . '_sortable_columns', [$this, 'sortable_columns'], 5, 2);    
    }

    /*
        Adds Thumbs to the Admin
    */
    public function posts_columns($defaults){
        $defaults['wps_post_thumbs'] = __('Company Logo');
        $defaults['menu_order'] = "Reihenfolge";
        return $defaults;
    }

    public function posts_custom_columns($column_name, $id){
        $c = $column_name;
        $post = get_post($id);

        if($column_name === 'wps_post_thumbs'){
            echo the_post_thumbnail( array(125,80) );
            // $image        = (get_post_meta($id, '_slider_image', true));
            // echo "<img src='$image' width=125px height=80px>";
        }

        if($column_name == 'menu_order')
            echo $post->menu_order;
    }

    public function sortable_columns($c){
        $c['menu_order'] = 'menu_order';
        return $c;
    }
      
}