function philosophy_search_form($form)
{ $home_dir = home_url('/'); $label = __('Search for:', 'philosophy'); $btn_label = __('Search', 'philosophy'); $search_form = <<<FORM <form role="search" method="get" class="header__search-form" action="{$home_dir}"> <label> <span class="hide-content">{$label}</span> <input type="search" class="search-field" placeholder="Type Keywords" value="" name="s" title="{$label}" autocomplete="off"> </label> <input type="hidden" name="post_type" value="book"> <input type="submit" class="search-submit" value="{$btn_label}"> </form> FORM; return $search_form;
}
add_filter('get_search_form', 'philosophy_search_form');