Create a file search.php
inside your theme-folder. In this file you can design the search page and its functionality.
Typically search page looks like this,
<?php
/**
* The template for displaying search results pages
*
* @link https://developer.wordpress.org/themes/basics/template-hierarchy/#search-result
*
* @package Torba_Market
*/
get_header(); ?>
<div class="container">
<section id="primary" class="content-area">
<main id="main" class="site-main" role="main">
<?php
if ( have_posts() ) : ?>
<header class="page-header">
<h1 class="page-title"><?php printf( esc_html__( 'Search Results for: %s', 'torba' ), '<span>' . get_search_query() . '</span>' ); ?></h1>
</header>
<?php
/* Start the Loop */
while ( have_posts() ) : the_post();
/**
* Run the loop for the search to output the results.
* If you want to overload this in a child theme then include a file
* called content-search.php and that will be used instead.
*/
get_template_part( 'components/post/content', 'search' );
endwhile;
the_posts_navigation();
else :
get_template_part( 'components/post/content', 'none' );
endif; ?>
</main>
</section>
</div>
<?php
get_footer();
?>
Here you can call different header and footer too.