Override the default number of posts to show for a single loop?

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Is is possible to override the set # of blog posts to show per page (as defined under Reading Settings in the WordPress admin)? I want to make it so a custom loop that I am using will show an unlimited number.

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5 comments

  1. The argument that controls how many posts are shown in the query is posts_per_page

    <?php query_posts( array( 
                         'post_type' => 'post',
                         'posts_per_page' => -1 ) 
      ); 
?>

    Also to note is that there is a bug in the 3.0 branch which prevents the -1 integer from displaying all posts. It is fixed in 3.1 but a workaround would be to use a very high number instead of -1

    see:

    http://core.trac.wordpress.org/ticket/15150

  4. I had the same issue.. I decided to add a custom variable and then catch that variable during pre_get_posts to set the post_per_page query_var:

    function custom_query_vars_filter($vars) {
  $vars[] = 'post_per_page_override';
  return $vars;
}
add_filter( 'query_vars', 'custom_query_vars_filter' );


add_action( 'pre_get_posts', 'rc_modify_query_get_design_projects' );
function rc_modify_query_get_design_projects( $query ) {

if( $query->query_vars['post_per_page_override'] == '3') {
        $query->set('posts_per_page', '3');
    }
}

    Then I went even further and make it get the exact amount you want to display in the custom query var:

    function custom_query_vars_filter($vars) {
  $vars[] = 'post_per_page_override';
  return $vars;
}
add_filter( 'query_vars', 'custom_query_vars_filter' );


add_action( 'pre_get_posts', 'rc_modify_query_get_design_projects' );
function rc_modify_query_get_design_projects( $query ) {

if( $query->query_vars['post_per_page_override']) {
        $customPPPlimit = $query->query_vars['post_per_page_override'];
        $query->set('posts_per_page', $customPPPlimit);
    }
}

    Worked for me..

  5. If you’re using a custom loop, just specify posts_per_page, e.g.:

    
$query = new WP_Query( [ 'posts_per_page' => 100 ] );
if ( $query->have_posts() ) {
    ......etc

    You could set posts_per_page to -1 for unlimited posts, but this is very bad practice. Instead set however many posts you think your server can serve without falling over so that your site doesn’t go down if too many posts are created, 200 is a good upper limit.

    Otherwise, use the pre_get_posts filter to modify the parameters passed to queries:

    add_action( 'pre_get_posts', function ( $query ) {
    if ( is_admin() ) {
        return;
    }
    $query->set( 'posts_per_page', 100 );
}

    Note that this will set all queries to 100 pages, including feeds, REST API, XMLRPC, etc

    In addition, some people will recommend query_posts, but this is bad practice and will cause lots of other issues