在 WordPress 中按两个类别显示帖子？

Question

我想让属于2个分类的post显示在我当前的post下，2个分类必须由显示的当前post决定，所以我写了这段代码但没有用，请帮忙，tnx。

<?php

    $categories = get_the_category();
    $category_id = $categories[0]->cat_ID;
    $category_id2 = $categories[1]->cat_ID;
    $query = new WP_Query( array('category__and' => ($category_id, $category_id2),
    'post_type' => 'post',
    'posts_per_page' => 4,
    'orderby' => 'publish_date',
    'order' => 'DESC',);
    while($query->have_posts()) : $query->the_post();

  ?>

Answer 1

它抛出一个 php error 因为你忘记了最后一个 )。

这应该有效：

$categories = get_the_category();
$category_id = $categories[0]->cat_ID;
$category_id2 = $categories[1]->cat_ID;
$query = new WP_Query(
 array(
 'category__and' => array( $category_id, $category_id2 ),
'post_type' => 'post',
'posts_per_page' => 4,
'orderby' => 'publish_date',
'order' => 'DESC',
),
);
while($query->have_posts()) : $query->the_post();

遇到这种情况尽量使用wp_debug

在 WordPress 中按两个类别显示帖子？

Displaying posts by two category in WordPress?

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