Question

我正在使用wordpress，我有一个SQL语句（如下所示）来收集特定类别的标签。唯一的问题是表名可能会改变（即它们不会总是wp_ *）。函数$pfx = $wpdb->base_prefix;返回wordpress数据库前缀的内容。

如何在我的SQL语句中使用$pfx（而不是wp_）。

global $wpdb;
$tags = $wpdb->get_results
("
SELECT DISTINCT terms2.term_id as tag_id, terms2.name as tag_name, null as tag_link, t2.count as post_total
    FROM
        wp_posts as p1
        LEFT JOIN wp_term_relationships as r1 ON p1.ID = r1.object_ID
        LEFT JOIN wp_term_taxonomy as t1 ON r1.term_taxonomy_id = t1.term_taxonomy_id
        LEFT JOIN wp_terms as terms1 ON t1.term_id = terms1.term_id,

        wp_posts as p2
        LEFT JOIN wp_term_relationships as r2 ON p2.ID = r2.object_ID
        LEFT JOIN wp_term_taxonomy as t2 ON r2.term_taxonomy_id = t2.term_taxonomy_id
        LEFT JOIN wp_terms as terms2 ON t2.term_id = terms2.term_id

    WHERE
        t1.taxonomy = 'category' AND p1.post_status = 'publish' AND terms1.term_id IN (".$args['categories'].") AND
        t2.taxonomy = 'post_tag' AND p2.post_status = 'publish'
        AND p1.ID = p2.ID
    ORDER BY post_total DESC
");

感谢。

Answer 1

更改示例

LEFT JOIN wp_term_relationships

到

LEFT JOIN ".$pfx."term_relationships

在SQL语句中使用PHP变量

1 个答案: