If some attribute is not used by you in the shortcode, then it should be removed from this shortcode.
heading – The title that will be shown above the search form.
number_items – The number of items that will be shown in the search results on the first page. Numeric value.
post_type – A unique key for one of the built-in custom post types: type-one (casino), type-two (game/slot), or type-three (bonus). You can only add one.
exclude_taxonomies – Which taxonomies should be excluded from the drop-down list in the advanced search form. Multiple taxonomy keys can be added, separated by commas. The taxonomy keys for categories are: Casino Category – type-one-category, Game/Slot Category – type-two-category, and Bonus Category – type-three-category. The keys of the custom taxonomies you added can be found in the admin panel in the Taxonomies section – Taxonomy Key column.
hide_first_button – If the shortcode for the item list of custom post types (Casino, Game/Slot, and Bonus) allows hiding the first button. Add the value yes to this attribute.
hide_second_button – If the shortcode for the item list of custom post types (Casino, Game/Slot, and Bonus) allows hiding the second button. Add the value yes to this attribute.
displayed_taxonomy – If the shortcode for the item list of custom post types (Casino, Game/Slot, and Bonus) allows showing taxonomy items. Add the taxonomy key whose items should be shown.
order_by – Available sorting options for items in the list can be found here.
order – There are two sorting options available. ASC (order from lowest to highest values) and DESC (order from highest to lowest values).
layout_style – Which search results layout style should be displayed. One of four styles can be applied for each post type (see the shortcode layouts for the corresponding post type). Valid values are 1, 2, 3, or 4.
vertical_image – Only applicable to search results for Type #2 posts. Please add the yes value to this attribute.
columns – Only applicable to layout styles that have columns. Valid values are 1, 2, 3, and 4.
