如何用逗号分隔分类术语，以便将其动态包含在税务查询中

Question

我已经设法返回已为帖子选择的分类法，但是，这些分类法将作为一个附录列表返回，例如covid1covid2covid3。我希望能够将这些covid1，covid2，covid3（不返回最后一个逗号）将其分开，以便我可以在税务查询中使用它，该查询将根据这些分类法动态返回相关的帖子。在下面查看我的代码

  $currentID = get_the_ID();
  $post_terms = get_the_terms($currentID, 'vocabulary_1');

  foreach ($post_terms as $post_term) {
      $postTerm = $post_term->slug;  
  }

  $args1 = array(
    'post_type' => 'cme-education',
    'posts_per_page' => '1',
    'post_status' => 'publish',
    'orderby'=>'rand',

    'tax_query' => array(
        array(
            'taxonomy' => 'vocabulary_1',
            'field'    => 'slug',
            'terms'    => array($postTerm),
            'operator' => 'IN',
            'order' => 'ASC'
        )
    )
);

Answer 1

问题出在 $postTerm 中。首先将其设为数组：

$postTerm = [];

然后在其中存储术语，如下所示：

foreach ($post_terms as $post_term) {
    $postTerm[] = $post_term->slug;
}

这是完整的代码：

$currentID  = get_the_ID();
$post_terms = get_the_terms($currentID, 'vocabulary_1');
$postTerm   = [];
foreach ($post_terms as $post_term) {
    $postTerm[] = $post_term->slug; 
}
$args1 = array(
    'post_type'         => 'cme-education',
    'posts_per_page'    => '1',
    'post_status'       => 'publish',
    'orderby'           =>'rand',
    'tax_query'         => array(
        array(
            'taxonomy'  => 'vocabulary_1',
            'field'     => 'slug',
            'terms'     => $postTerm,
            'operator'  => 'IN',
            'order'     => 'ASC'
        )
    )
);