something weird is going on when setting posts_per_page

[mmjaeger]

Hello
Hopefully somebody can help:

I got a category with 10 posts assign to it - I got the following code in functions.php:

add_action( 'pre_get_posts', 'test' );
	function test( $query ) {
	
		$num = is_paged() ? 8 : 6;
		
		$query->set( 'posts_per_page', $num );
	
	}		

I'd like to show a different number of post on the first page - if I put 6 for the first page and 6 for the following page(s) I correctly get 6 post on the first page and 4 on the 2nd page - if I put 8 for the following pages - it only shows me 2 posts on the 2nd page the first page is correct.

any number higher than 8 leads to a 404 when clicking on the pagination.

what am I missing here.

Thank you in advance for your input.

[Victor Font]

First set the number of posts per page to the number you want on the first page. Next, take a look at the following code:

function tax_and_offset_homepage( $query ) {
  if ($query->is_home() && $query->is_main_query() && !is_admin()) {
    $query->set( 'post_type', 'my_post_type' );
    $query->set( 'post_status', 'publish' );
    $query->set( 'ignore_sticky_posts', '-1' );
    $tax_query = array(
        array(
            'taxonomy' => 'my_taxo',
            'field' => 'slug',
            'terms' => array('slug1', 'slug2', 'slug3')
        )
    );
    $query->set( 'tax_query', $tax_query );
    $ppp = get_option('posts_per_page');
    $offset = 1;
    if (!$query->is_paged()) {
      $query->set('posts_per_page',$offset + $ppp);
    } else {
      $offset = $offset + ( ($query->query_vars['paged']-1) * $ppp );
      $query->set('posts_per_page',$ppp);
      $query->set('offset',$offset);
    }
  }
}
add_action('pre_get_posts','tax_and_offset_homepage');

function homepage_offset_pagination( $found_posts, $query ) {
    $offset = 1;

    if( $query->is_home() && $query->is_main_query() ) {
        $found_posts = $found_posts - $offset;
    }
    return $found_posts;
}
add_filter( 'found_posts', 'homepage_offset_pagination', 10, 2 );

This code let's you have a different number of posts on subsequent pages. Adjust the offset to reflect the the difference in the number of posts between the first page and subsequent pages.

---

Regards,

Victor
https://victorfont.com/
Call us toll free: 844-VIC-FONT (842-3668)
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[mmjaeger]

Thank you for your input - I came up with the following code meanwhile - it looks like it's working be I have not fully tested it yet:

$current_page = absint( get_query_var( 'paged' ) );
				
				$offset = $current_page > 2 ? ( $current_page - 2 ) * $post_per_page_subsequent + $posts_per_page_first  : $posts_per_page_first;

[Author]

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