advanced-search.php

<?php
/**
 * Template Name: Advanced Search
 */
get_header(); ?>
<?php
$min_price = $_GET['min_price'] ?? '';
$max_price = $_GET['max_price'] ?? '';
?>
	<div class="wrap">
		<div id="primary" class="content-area">
			<main id="main" class="site-main" role="main">
				<form class="advanced-search-form">
					<div class="form-group">
						<label for="">Min Price</label>
						<input type="number" name="min_price" value="<?php echo esc_attr($min_price); ?>">
					</div>
					<div class="form-group">
						<label for="">Max Price</label>
						<input type="number" name="max_price" value="<?php echo esc_attr($max_price); ?>">
					</div>
					<div class="form-group">
						<input type="submit" value="Search">
					</div>
				</form>
				<?php if ( $min_price || $max_price ): ?>
					<div class="search-result">
						<?php
						$args = [
							'posts_per_page' => - 1,
							'meta_query'     => []
						];
						if ( $min_price ) {
							$args['meta_query'][] = [
								'key'     => 'hcf_price',
								'value'   => $min_price,
								'compare' => '>=',
								'type'    => 'NUMERIC'
							];
						}
						if ( $max_price ) {
							$args['meta_query'][] = [
								'key'     => 'hcf_price',
								'value'   => $max_price,
								'compare' => '<=',
								'type'    => 'NUMERIC'
							];
						}
						$search_query = new WP_Query( $args );
						if ( $search_query->have_posts() ):
							while ( $search_query->have_posts() ) {
								$search_query->the_post();
								get_template_part( 'template-parts/post/content', 'excerpt' );
							}
							wp_reset_postdata();
							?>
						<?php else: ?>
							<p>No result found.</p>
						<?php endif; ?>
					</div>
				<?php endif; ?>
			</main><!-- #main -->
		</div><!-- #primary -->
	</div><!-- .wrap -->

<?php get_footer();