search.php

<?php

$args = array('posts_per_page'   => 5,
                'orderby'          => 'post_title',
                'order'            => 'ASC',
                'post_type'        => 'tour',
                'post_status'      => 'publish',
                'paged' => $paged);

$sdate = !empty($_GET['sdate']) ? sanitize_text_field($_GET['sdate']) : 0;

$paged = ( get_query_var('paged') ) ? get_query_var('paged') : 1;
$meta_q = array('relation' => 'AND');
     
if($sdate){
    $start_date = date('Ymd', strtotime($sdate));
    $meta_q[] = array('key'	=> 'date_and_price_%_date', 'value' => '"' .$start_date. '"', 'compare'	=> '<=');
}


if(count($meta_q) > 1)
    $args['meta_query'] = $meta_q;

$wp_query = new WP_Query($args);
?>