<?php
function filter_cars_dalinger()
{
    $post_args = [
        'my_marka' => FILTER_SANITIZE_STRING,
        'my_model' => FILTER_SANITIZE_STRING,
        'my_transmission' => FILTER_SANITIZE_STRING,
        'my_fuel' => FILTER_SANITIZE_STRING,
        'my_price-until' => FILTER_SANITIZE_NUMBER_FLOAT,
        'my_price-after' => FILTER_SANITIZE_NUMBER_FLOAT
    ];

    $post = filter_input_array(INPUT_POST, $post_args);
    $paged = get_query_var('paged') ? get_query_var('paged') : 1;        //новое

    if( isset ($post) )
    {
        // print_r($post);
        $args = array(
            'numberposts'   => -1,
            'meta_key' => 'carsinfo',
            'post_type' => 'cars',
            'paged' => $paged,                                           //новое
            'tax_query' => array(
                'relation' => 'AND'
            )
        );

        if($post['my_marka'] !== 'full')
        {
            array_push($args['tax_query'], array (
                'taxonomy' => 'carmake',
                'field' => 'term_id',
                'terms' => array($post['my_marka']),
            ));
        }

        if($post['my_model'] !== 'full')
        {
            array_push($args['tax_query'], array (
                'taxonomy' => 'carmake',
                'field' => 'child_of',
                'terms' => array($post['my_model']),
            ));
        }

        if($post['my_transmission'] !== 'full')
        {
            array_push($args['tax_query'], array (
                'taxonomy' => 'transmission',
                'field' => 'term_id',
                'terms' => array($post['my_transmission']),
            ));
        }

        if($post['my_fuel'] !== 'full')
        {
            array_push($args['tax_query'], array (
                'taxonomy' => 'fuel',
                'field' => 'term_id',
                'terms' => array($post['my_fuel']),
            ));
        }

        if( !empty( $post['my_price-until'] ) )
        {
            $args['meta_query'][] = array(
                'key' => 'price',
                'value' => $post['my_price-until'],
                'type' => 'numeric',
                'compare' => '>='
            );
        }

        if( !empty( $post['my_price-after'] ) )
        {
            $args['meta_query'][] = array(
                'key' => 'price',
                'value' => $post['my_price-after'],
                'type' => 'numeric',
                'compare' => '<='
            );
        }

        return new WP_Query($args);
    }
    else
    {
        $args = array(
            'numberposts'   => -1,
            'meta_key' => 'carsinfo',
            'post_type' => 'cars',
            'current' => max( 1, get_query_var('paged') ),
           'paged' => $paged                                              //новое
        );

        return new WP_Query($args);
    }
}