the custom single post templates structure is same as a post-default template or single.php file, If you find some design change on some case of displaying custom post then you can make a single post display page for the custom post type and we will learn custom post template development step by step
for that, you have to learn how to declare a custom post type in WordPress
now suppose your custom post type id is custom_slider
Now the first step is
create a PHP file by the name single-<your post type id>.php and in this case, the page name will be single-custom_slider.php
and the rest of the step is similar to developing a single.php file
Single custom post
Step 2.
Take an HTML design to display the post and copy the HTML and paste on the single.php file
Step 3.
Now place the header, footer, and sidebar of your theme by using the code <?php get_header(); ?>, <?php get_footer(); ?> and <?php get_sidebar(); ?>
Step 5.
Now fetch all content of the post to be displayed. use the code <?php if(have_posts()): the_post(); endif; ?> and the comment template for the page bu using the code <?php comments_template(); ?>
Step 6.
now get the title, content and featured image by using the code <?php the_title(); ?>, <?php the_content(); ?> and <img src="<?php echo wp_get_attachment_url( get_post_thumbnail_id($post->ID)); ?>" class="img-responsive" />
Now the full code for making a single.php file inside your theme folder
<?php get_header(); ?> <div class="container"> <?php if(have_posts()): the_posts(); ?> <div class="row"> <div class="col-md-8"> <h2><?php the_title(); ?></h2> <img src="<?php echo wp_get_attachment_url( get_post_thumbnail_id($post->ID)); ?>" class="img-responsive" /> <?php the_content(); ?> <?php comments_template(); ?> </div> <div class="col-md-4"> <?php get_sidebar(); ?> </div> </div> <?php endif; ?> </div> <?php get_footer(); ?>
Now we have created a custom single post type template successfully