我有这个自定义循环，由于某种原因，"Sort"不起作用。
<?php
if(isset($_REQUEST['sort'])){
if($_REQUEST['sort'] == 'newest' )
$order = "&orderby=title&order=DESC";
else if($_REQUEST['sort'] == 'oldest' )
$order = "&orderby=title&order=ASC";
else if($_REQUEST['views'] == 'oldest' )
$order = "&meta_key=views&orderby=meta_value_num&order=DESC";
}
else
$order = "&orderby=ID&order=DESC";
?>
<form method="post" id="order">
<select name="sort" onchange='this.form.submit()'>
<option value="newest">Sort by Newest</option>
<option value="oldest">Sort by Oldest</option>
<option value="views">Sort by Most Viewed</option>
</select>
</form>
<ul class="acapellas row">
<?php
$loop = new WP_Query( array(
'post_type' => 'acapella',
'posts_per_page' => 10,
'paged' => $paged,
'orderby' => 'date',
'order' => $_POST['sort']
) );
?>
<?php $paged = (get_query_var('paged')) ? get_query_var('paged') : 1; ?>
<?php if ( $loop->have_posts() ) : while ( $loop->have_posts() ) : $loop->the_post(); ?>
<?php $posts = query_posts($query_string . $order); ?>
<li class="post-<?php the_ID(); ?> col-md-6">
<div class="wrap">
<h2><a href="<?php the_permalink(); ?>"><?php the_title() ?></a></h2>
<?php if(pmpro_hasMembershipLevel($level_id)) { ?>
<?php the_content(); ?>
<?php } else { ?>
<div class="pro-player">
<div class="upgrade">
<a href="<?php bloginfo('url'); ?>/pro" >Upgrade to unlock</a>
</div>
</div>
<?php } ?>
<a class="download left" href="<?php the_permalink(); ?>">Download</a>
<span class="list-date right">First added: <?php the_time('F jS, Y') ?></span><br>
<?php
global $post;
$post_type = get_post_type(get_the_ID());
$post_type_taxonomies = get_object_taxonomies($post_type);
if (!empty($post_type_taxonomies)) {
echo '<ul class="details">';
foreach ($post_type_taxonomies as $taxonomy) {
$terms = get_the_term_list(get_the_ID(), $taxonomy, '', '</li><li>', '');
if ($terms) {
echo '<li>' . $terms . '</li>';
}
}
echo '</ul>';
}
?>
</div>
</li>
<?php endwhile; endif; ?>
</ul>
可以使用get_posts()函数
$posts = get_posts([
'orderby' => 'date',
'order' => $_POST['sort']
]);
并发送post变量'ASC'或'DESC' -这将是最新或最旧的