custom-posts.php

function create_posttype() {

// Twenty Twenty Slider
  register_post_type( 'twenty_slider',
    array(
      'labels' => array(

        'name'               => __( 'Twenty Sliders', 'post type general name', 'your-plugin-textdomain' ),
        'singular_name'      => __( 'Twenty Slider', 'post type singular name', 'your-plugin-textdomain' ),
        'menu_name'          => __( 'Twenty Sliders', 'admin menu', 'your-plugin-textdomain' ),
        'name_admin_bar'     => __( 'Twenty Slider', 'add new on admin bar', 'your-plugin-textdomain' ),
        'add_new'            => __( 'Add New', 'Twenty Slider', 'your-plugin-textdomain' ),
        'add_new_item'       => __( 'Add New Twenty Slider', 'your-plugin-textdomain' ),
        'new_item'           => __( 'New Twenty Slider', 'your-plugin-textdomain' ),
        'edit_item'          => __( 'Edit Twenty Slider', 'your-plugin-textdomain' ),
        'view_item'          => __( 'View Twenty Slider', 'your-plugin-textdomain' ),
        'all_items'          => __( 'All Twenty Sliders', 'your-plugin-textdomain' ),
        'search_items'       => __( 'Search Twenty Sliders', 'your-plugin-textdomain' ),
        'parent_item_colon'  => __( 'Parent Twenty Sliders:', 'your-plugin-textdomain' ),
        'not_found'          => __( 'No Twenty Sliders found.', 'your-plugin-textdomain' ),
        'not_found_in_trash' => __( 'No Twenty Sliders found in Trash.', 'your-plugin-textdomain' )
      ),
                     'public'=> true,
                  'menu_icon'=> 'dashicons-format-gallery ',  /* For Dashicons Menu */
        'publicly_queryable' => true,
        'show_ui'            => true,
        'show_in_menu'       => true,
        'query_var'          => true,
        'rewrite'            => array( 'slug' => 'Twenty Slider' ),
        'capability_type'    => 'post',
        'has_archive'        => true,
        'hierarchical'       => false,
        'menu_position'      => null,
        'supports'           => array('title')
        // all supports options  'title', 'editor', 'author', 'thumbnail', 'excerpt', 'comments','trackbacks','custom-fields','revisions','page-attributes','post-formats'
    )
  );
  // add another custom post
}
add_action( 'init', 'create_posttype' );