Add custom taxonomy to search form

functions.php

<?php

/**
 * Add custom taxonomy to search form
 */

add_filter( 'wpsight_get_search_fields', 'custom_wpsight_get_search_fields' );

function custom_wpsight_get_search_fields( $fields ) {
  
	$fields['feature'] = array(
  
		'data' => array(
			// wp_dropdown_categories() options
			'taxonomy'			=> 'feature',
			'show_option_none' 	=> __( 'Feature', 'wpcasa' ),
			'option_none_value' => '',
			'hierarchical'		=> 1,
			'orderby'         	=> 'name',
			'order'           	=> 'ASC'
		),
		'type' 			=> 'taxonomy_select',
		'class'			=> 'width-1-5',
		'priority'		=> 50
  
	);
	
	return $fields;
  
}