Complex search form with results page

Based on the simple search and category form this example adds form fields for:

CPTs
Tags
Custom Taxonomies
Custom Fields
Range Selectors
Order by
Order (Asc/Desc)
by distance (to be done)

Custom vars (functions.php)

<?php
 function custom_search_query_vars_filter($vars) {
	$vars[] .= 'cs_text_field';
    $vars[] .= 'cs_category_name';
    $vars[] .= 'cs_tag';
    $vars[] .= 'cs_orderby';
    $vars[] .= 'cs_order';
    $vars[] .= 'cs_post_type';
    $vars[] .= 'cs_rating';
    $vars[] .= 'cs_featured';
    $vars[] .= 'cs_location_category';
    $vars[] .= 'cs_price_group';
	return $vars;
}
add_filter( 'query_vars', 'custom_search_query_vars_filter' );
?>

Template part (parts/search/searchform-all.php)

<?php 
$current_url = home_url($_SERVER['REQUEST_URI']);
// or $_PHP_SELF
$textField = sanitize_text_field(get_query_var('cs_text_field'));
$filterByCategory = sanitize_text_field(get_query_var('cs_category_name'));
$filterByTag = sanitize_text_field(get_query_var( 'cs_tag' ));
$orderBy = sanitize_text_field(get_query_var( 'cs_orderby' ));
$order = sanitize_text_field(get_query_var( 'cs_order' ));
$postType = sanitize_text_field(get_query_var( 'cs_post_type' ));
$rating = sanitize_text_field(get_query_var( 'cs_rating' ));
$featured = sanitize_text_field(get_query_var( 'cs_featured' ));
$locationCategory = sanitize_text_field(get_query_var( 'cs_location_category' ));
$priceGroup = sanitize_text_field(get_query_var( 'cs_price_group' ));
$minPrice = 0; 
$maxPrice = 9999999999; 
$priceGroupText = 'All prices';

if ($priceGroup == 1 ) { $min_price = 0; $max_price = 10000; $priceGroup_text = 'Up to £10,000';} 
elseif ($priceGroup == 2 ) { $min_price = 10000; $max_price = 20000; $priceGroup_text = '£10,000 - £20,000';}
elseif ($priceGroup == 3 ) { $min_price = 20000; $max_price = 30000; $priceGroup_text = '£20,000 - £30,000';}
elseif ($priceGroup == 4 ) { $min_price = 30000; $max_price = 40000; $priceGroup_text = '£30,000 - £40,0000';}
elseif ($priceGroup == 5 ) { $min_price = 40000; $max_price = 50000; $priceGroup_text = '£40,000 - £50,000';}
elseif ($priceGroup == 6 ) { $min_price = 50000; $priceGroup_text = '£50,000 Plus';}

?>
<form role="search" method="get" action="<?php $current_url ?>#form" class="wp-block-search__button-outside wp-block-search__text-button wp-block-search">
	<label for="wp-block-search__input-1" class="wp-block-search__label">Search the site</label>
	<div class="wp-block-search__inside-wrapper ">
		<input type="search" id="wp-block-search__input-1" class="wp-block-search__input " name="cs_text_field" value="<?php echo $textField ?>" placeholder="Text Search..." >
	</div>
	<hr class="clearfix" />
	<label for="wp-block-search__input-2" class="wp-block-search__label">Category</label>
	<div class="wp-block-search__inside-wrapper ">
		<select name="cs_category_name">
			<option value="" >Select below:</option>
			<?php 
				$args = array(
					'exclude' => '1'
				);
				
				$categories = get_categories( $args );
				foreach ( $categories as $category ) {
				$selected = $category->slug === $filterByCategory ? 'selected' : '';
														
				echo '<option value="' . $category->slug . '" ' . $selected . '>' . $category->name . '</option>';
				} 
				?>
			</select>
	</div>
	<hr class="clearfix" />
    <label for="wp-block-search__input-3" class="wp-block-search__label">Tag</label>
	<div class="wp-block-search__inside-wrapper ">
		<select name="cs_tag">
			<option value="" >Select below:</option>
			<?php 
				$tags = get_tags();

                foreach ( $tags as $tag ) {
                    $selected = $tag->slug === $filterByTag ? 'selected' : '';
                                                    
                    echo '<option value="' . $tag->slug . '" ' . $selected . '>' . $tag->name . '</option>';
                  }
				?>
			</select>
	</div>
	<hr class="clearfix" />
    <label for="wp-block-search__input-4" class="wp-block-search__label">Order by</label>
	<div class="wp-block-search__inside-wrapper ">
		<select name="cs_orderby">
			<?php 
				$orderByOptions = array('date' => 'Date', 'title' => 'Title' );

                foreach ( $orderByOptions as $orderByValue => $orderByText ) {
                    $selected = (!$orderBy && $orderByValue === 'date') || $orderByValue === $orderBy ? 'selected' : '';
                   
                    echo '<option value="' . $orderByValue . '" ' . $selected . '>' . $orderByText . '</option>';
                }
				?>
			</select>
	</div>
	<hr class="clearfix" />
    <label for="wp-block-search__input-5" class="wp-block-search__label">Order</label>
	<div class="wp-block-search__inside-wrapper ">
		<select name="cs_order">
			<?php 
				$orderOptions = array('DESC', 'ASC' );

                foreach ( $orderOptions as $orderOption ) {
                    $selected = (!$order && $orderOption === 'DESC') || $orderOption === $order ? 'selected' : '';
                                                            
                    echo '<option value="' . $orderOption . '" ' . $selected . '>' . $orderOption . '</option>';
                }
				?>
			</select>
	</div>
	<hr class="clearfix" />
    <label for="wp-block-search__input-6" class="wp-block-search__label">Post Type</label>
	<div class="wp-block-search__inside-wrapper ">
		<select name="cs_post_type">
			<option value="" >Select below:</option>
			<?php 
                $args = array(
                    'public'   => true,
                    '_builtin' => false
                );
                $thePostTypes = get_post_types($args, 'objects'); ?>
                <?php
                foreach ( $thePostTypes as $thePostType ) {
                    $selected = $thePostType->name === $postType ? 'selected' : '';
                                                    
                    echo '<option value="' . $thePostType->name . '" ' . $selected . '>' . $thePostType->labels->singular_name . '</option>';
                  }
				?>
			</select>
	</div>
	<hr class="clearfix" />
    <label for="wp-block-search__input-7" class="wp-block-search__label">Rating</label>
	<div class="wp-block-search__inside-wrapper ">
		<select name="cs_rating">
			<option value="" >Select below:</option>
            <?php $ratingOptions = array('one-star' => '1 Star', 'two-star' => '2 Star', 'three-star' => '3 Star', 'four-star' => '4 Star', 'five-star' => '5 Star' ); ?>
                <?php
                foreach ( $ratingOptions as $ratingOptionValue => $ratingOptionText ) {
                    $selected = $ratingOptionValue === $rating ? 'selected' : '';
                                                    
                    echo '<option value="' . $ratingOptionValue . '" ' . $selected . '>' . $ratingOptionText . '</option>';
                  }
				?>
			</select>
	</div>
	<hr class="clearfix" />
    <label for="wp-block-search__input-8" class="wp-block-search__label">Featured</label>
	<div class="wp-block-search__inside-wrapper ">
		<select name="cs_featured">
            <?php $featuredOptions = array('' => 'Not Featured', 'featured' => 'Featured'); ?>
                <?php
                foreach ( $featuredOptions as $featuredOptionValue => $featuredOptionText ) {
                    $selected = $featuredOptionValue === $featured ? 'selected' : '';
                                                    
                    echo '<option value="' . $featuredOptionValue . '" ' . $selected . '>' . $featuredOptionText . '</option>';
                  }
				?>
			</select>
	</div>
	<hr class="clearfix" />
    <label for="wp-block-search__input-9" class="wp-block-search__label">Location Category</label>
	<div class="wp-block-search__inside-wrapper ">
		<select name="cs_location_category">
            <option value="" >Select below:</option>
                <?php 
                $terms = get_terms( array(
                    'taxonomy' => 'locations-category',
                    'hide_empty' => false,
                ) );
                foreach ( $terms as $term ) {
                    $selected = $term->slug === $locationCategory ? 'selected' : '';
                                                    
                    echo '<option value="' . $term->slug . '" ' . $selected . '>' . $term->name . '</option>';
                  }
				?>
			</select>
	</div>
	<hr class="clearfix" />

    <label for="wp-block-search__input-10" class="wp-block-search__label">Price Group</label>
	<div class="wp-block-search__inside-wrapper ">
		<select name="cs_price_group">
            <option value="0" <?php if ($priceGroup == "0") { ?> selected <?php } ?>>Select a price range</option>
            <option value="1" <?php if ($priceGroup == "1") { ?> selected <?php } ?>>Up to £10,000</option>
            <option value="2" <?php if ($priceGroup == "2") { ?> selected <?php } ?>>£10,000 - £20,000</option>
            <option value="3" <?php if ($priceGroup == "3") { ?> selected <?php } ?>>£20,000 - £30,000</option>
            <option value="4" <?php if ($priceGroup == "4") { ?> selected <?php } ?>>£30,000 - £40,000</option>
            <option value="5" <?php if ($priceGroup == "5") { ?> selected <?php } ?>>£40,000 - £50,000</option>
            <option value="6" <?php if ($priceGroup == "6") { ?> selected <?php } ?>>£50,000 plus</option>
			</select>
	</div>
	<hr class="clearfix" />
    <!-- <a href="<?php $_PHP_SELF ?>#form" class="button">Clear all</a> -->
    <hr />	
	 <button type="submit" class="wp-block-search__button  ">Search this site</button>			
</form> 
<hr />
<hr />
<h3>Results below...</h3>
<hr />
<hr />
<?php 
$args = array(
		'post_type' => 'post', 
		'posts_per_page' => -1, 
		'post_status' => 'publish',
        'ignore_sticky_posts' => true
);
if (!empty ($rating) ) {
    if (!empty ($featured) ) {
        $newArgs = array(
            'meta_query'    => array(
                'relation'      => 'AND',
                array(
                    'key'       => 'rating',
                    'value'     => $rating,
                    'compare'   => '='
                ),
                array(
                    'key'       => 'featured',
                    'value'     => true,
                    'compare'   => '='
                )
            )
        );
    } else {
        $newArgs = array(
            'meta_query'    => array(
                array(
                    'key'       => 'rating',
                    'value'     => $rating,
                    'compare'   => '='
                )
            )
        );
    }
    $args = array_merge($args, $newArgs);
}
if (!empty ($featured) ) {
    if (!empty ($rating) ) {
        $newArgs = array(
            'meta_query'    => array(
                'relation'      => 'AND',
                array(
                    'key'       => 'rating',
                    'value'     => $rating,
                    'compare'   => '='
                ),
                array(
                    'key'       => 'featured',
                    'value'     => true,
                    'compare'   => '='
                )
            )
        );
    } else {
        $newArgs = array(
            'meta_query'    => array(
                array(
                    'key'       => 'featured',
                    'value'     => true,
                    'compare'   => '='
                )
            )
        );
    }
    $args = array_merge($args, $newArgs);
}
if (!empty ($priceGroup) ) {
    $newArgs = array(
        'meta_query' => array(
            array(
                    'key' => 'price',
                    'value' => array($min_price, $max_price),
                    'type' => 'numeric',
                    'compare' => 'BETWEEN'
                    )
            )
    );
    $args = array_merge($args, $newArgs);
}

if (!empty ($textField) ) {
    $newArgs = array(
        's' => $textField,
    );
    $args = array_merge($args, $newArgs);
}
if (!empty ($filterByCategory) ) {
    $newArgs = array(
        'category_name'		=> $filterByCategory,
    );
    $args = array_merge($args, $newArgs);
}
if (!empty ($filterByTag) ) {
    $newArgs = array(
        'tag'		=> $filterByTag,
    );
    $args = array_merge($args, $newArgs);
}
if (!empty ($orderBy) ) {
    $newArgs = array(
        'orderby'		=> $orderBy,
    );
    $args = array_merge($args, $newArgs);
}
if (!empty ($order) ) {
    $newArgs = array(
        'order'		=> $order,
    );
    $args = array_merge($args, $newArgs);
}
if (!empty ($postType) ) {
    $newArgs = array(
        'post_type' => $postType, 
    );
    $args = array_merge($args, $newArgs);
}
if (!empty ($locationCategory) ) {
    $newArgs = array('tax_query' => array(
        array(
            'taxonomy' => 'locations-category',
            'field'    => 'slug',
            'terms'    => $locationCategory,
        ),
    )
    );
    $args = array_merge($args, $newArgs);
}
$search_query = new WP_Query( $args );
?>
<?php if($search_query->have_posts()): ?>
    <div class="custom-search-results">
    <?php while($search_query->have_posts()): $search_query->the_post() ?>
    
        <a href="<?php the_permalink(); ?>">
            <?php the_title(); ?>
            - <?php $post_date = get_the_date( 'l F j, Y' ); echo $post_date; ?> 
            - <?php 
            $rating = get_field('rating');
            echo $rating['label']; ?>  
            - <?php if (get_field('featured') == true) {
                echo 'this is featured';
            } else {
                echo 'not featured';
            } ?>
            - <?php if (get_field('price')) { ?>
                £<?php
                the_field('price');
            } ?>
            - 
            <?php 
            $term_obj_list = get_the_terms( $post->ID, 'locations-category' );
            $terms_string = join(', ', wp_list_pluck($term_obj_list, 'name'));
            echo $terms_string;
             ?>
         </a><hr />
    <?php endwhile; ?>
        </div>
<?php endif; ?>
<?php wp_reset_postdata(); ?>
<?php if (!empty ($textField) ) { ?>
    <p>You searched for "<?php echo $textField; ?> ". Here are the results:</p>
<?php } ?>
<?php if (!empty ($filterByCategory) ) { ?>
    <p>In Category: <?php echo $filterByCategory; ?>.</p>
<?php } ?>
<?php if (!empty ($filterByTag) ) { ?>
    <p>With Tag: <?php echo $filterByTag; ?>.</p>
<?php } ?>
<?php if (!empty ($orderBy) ) { ?>
    <p>Ordered by: <?php echo $orderBy; ?>.</p>
<?php } ?>
<?php if (!empty ($order) ) { ?>
    <p>Order: <?php echo $order; ?>.</p>
<?php } ?>
<?php if (!empty ($postType) ) { ?>
    <p>Post type: <?php echo $postType; ?>.</p>
<?php } ?>
<?php if (!empty ($rating) ) { ?>
    <p>Rating: <?php echo $rating; ?>.</p>
<?php } ?>
<?php if (!empty ($featured) ) { ?>
    <p>Featured: <?php echo $featured; ?>.</p>
<?php } ?>
<?php if (!empty ($locationCategory) ) { ?>
    <p>Location Category: <?php echo $locationCategory; ?>.</p>
<?php } ?>