在WordPress中，获取所有在标题、标签或类别中都有关键字的帖子？

Question

我的问题类似于this one，但现在已经7岁了，所以我想再问一次。

我使用的是get_posts()函数，但是作为's‘参数传递的任何内容似乎只与post标题匹配。例如，此代码只返回标题中包含“向日葵”的帖子，而不返回标签中包含“向日葵”的帖子。

$args = array(  'numberposts' => 99,  's' => 'sunflower'); 
$postslist = get_posts( $args );  

我刚开始做WP开发，也许我忽略了什么或者使用了错误的函数.任何指点都会非常感谢！

Answer 1

IMHO --这比它应该的要复杂得多，但是我设法用以下代码得到了我想要的：

$searchTerm =  trim($_REQUEST['search']);

// Get all slugs that are a partial match in tags
$matching_terms_tags = get_terms( array(  'taxonomy' => 'post_tag',  'fields' => 'slugs', 'name__like' => $searchTerm ) );

// Get all slugs that are a partial match in categories
$matching_terms_categories = get_terms( array( 'taxonomy' => 'category',  'fields' => 'slugs', 'name__like' => $searchTerm ) );                       

// Build taxonomy query 
$argsTax = array('numberposts' => 999, 'posts_per_page' => -1, 'nopaging' => true);
$argsTax['tax_query'] = array 
        (
            array
            (
                'relation' => 'OR',
                array ('taxonomy' => 'category', 'field' => 'slug', 'terms'    => $matching_terms_categories,'operator' => 'IN',),
                array ('taxonomy' => 'post_tag', 'field' => 'slug', 'terms'    => $matching_terms_tags, 'operator' => 'IN', ),
            ),
        );            

// Get all posts with matching tags and/or matching categories
$postsTax = get_posts($argsTax);

// Also get all posts matching the term, using the regular WP argument 's'
$argsTerms = array('numberposts' => 999, 'posts_per_page' => -1, 'nopaging' => true, 's' => $searchTerm);
$postsSearch = get_posts($argsTerms);

// Merge the 2 result sets and remove duplicates            
$postsAll = array_merge($postsSearch, $postsTax);            
$postAllNoDupes = array_map("unserialize", array_unique(array_map("serialize", $postsAll)));

foreach ($postAllNoDupes as $post)
{
    echo get_the_title($post);
}

wp_reset_query(); 

Answer 2

另外，要获得以“向日葵”为标记的帖子，您需要添加如下所示的分类参数：

$args = [
'numberposts' => 99,
's' => 'sunflower',
'tax_query' => [
        [
            'taxonomy' => 'post_tag',
            'field'   => 'slug',
            'terms'   => 'sunflower'
        ]
    ]
]; 

$postslist = get_posts( $args );

官方文件：https://developer.wordpress.org/reference/functions/get_posts/