How to create custom post type in WordPress

 You can create  custom post type by the  simple wordpress  action   hook  just write a action hook

add_action( 'init', 'create_post_type' );

Now you need to write the  function 

function create_post_type() {

  your register post type code here

}

Now in the  function you need to add the  register post type and name   and view permission

  register_post_type( 'mycustom_blog',

    array(

      'labels' => array(

        'name' => __( 'My Blogs' ),

        'singular_name' => __( 'My Blog' )

      ),

      'public' => true,

      'has_archive' => true,

    )

Here  'mycustom_blog ‘ is the  custom post type and  which will save in database to difference the post type .

In the 'labels'  name  of the label which will show in the  backend .

Final code is  you need to add in the  function.php

Is  here

<?php

add_action( 'init', 'create_post_type' );

function create_post_type() {

  register_post_type( 'mycustom_blog',

    array(

      'labels' => array(

        'name' => __( 'My Blogs' ),

        'singular_name' => __( 'My Blog' )

      ),

      'public' => true,

      'has_archive' => true,

    )

  );

} ?>