WordPress. Set number of custom posts displayed.

This tutorial shows how to set amount of custom posts in WordPress. Usually you should be able to set the amount of displayed posts in WordPress administration panel in Appearance > Reading section.

If the "Blog pages show at most" option doesn’t affect your posts please do the following:

1. Access your WordPress installation directory

2. Go to wp-content/themes/theme### folder

3. Open functions.php file

At the beginning of the document after the opening <?php tag add the following:

function iti_custom_posts_per_page($query)
  {
  switch ( $query->query_vars['post_type'] )
  {
  case 'your_custom_post_type_name': // Post Type named 'your_custom_post_type_name'
  $query->query_vars['posts_per_page'] = X;
  break;
  default:
  break;
  }
  return $query;
  }
if( !is_admin() )
  {
  add_filter( 'pre_get_posts', 'iti_custom_posts_per_page' );
  }

Where replace ‘your_custom_post_type_name’ with your custom post type name. And replace X for the variable $query->query_vars[‘posts_per_page’] with the amount of posts you want to display. For example:

$query->query_vars['posts_per_page'] = 20;