wpdb get_results 当关键字包含 & 符号时为空（而同样的请求在 phpMyAdmin SQL 中工作正常）

Question

我对 wpdb->get_results 有一个非常具体的问题我已经实现了自定义搜索请求，它能够搜索我们所有的自定义类型和自定义结构表。查询工作正常（因此没有数据库连接问题），直到搜索关键字包含与号 (&)。真正的谜团是，如果我回显请求本身，然后通过 phpMyAdmin SQL 运行它，查询 returns 预期的（和期望的）结果。我尝试使用 mysqli 但无济于事。

以下是搜索系统中使用的代码的关键部分：

$request = "SELECT DISTINCT
                    SQL_CALC_FOUND_ROWS
                    p.ID,
                    (SELECT meta_value FROM wp_postmeta WHERE post_id = p.ID AND meta_key = 'latitude') AS latitude,
                    (SELECT meta_value FROM wp_postmeta WHERE post_id = p.ID AND meta_key = 'longitude') AS longitude
                        FROM wp_posts p
                        WHERE p.post_type = 'studia'
                            AND (SELECT meta_value FROM wp_postmeta WHERE post_id = p.ID AND meta_key = 'latitude') > 0
                            AND (SELECT meta_value FROM wp_postmeta WHERE post_id = p.ID AND meta_key = 'longitude') > 0
                            AND ((SELECT meta_value FROM wp_postmeta WHERE post_id = p.ID AND meta_key = 'mesto' LIMIT 1) LIKE '%" . $keyword . "%'
                                 OR p.post_title LIKE '%" . $keyword . "%'
                                 OR (SELECT meta_value FROM wp_postmeta WHERE post_id = p.ID AND meta_key = 'ulice' LIMIT 1) LIKE '%" . $keyword . "%'
                                 OR (SELECT IF(pm.meta_value LIKE 'a:%',(SELECT post_title FROM wp_posts WHERE ID = SUBSTRING_INDEX(SUBSTRING_INDEX(pm.meta_value,'\"',2),'\"',-1)), pm.meta_value ) FROM wp_postmeta pm WHERE pm.post_id = p.ID AND meta_key = 'studio' ) LIKE '%" . $keyword . "%')";
        echo $request;
        $studios = $wpdb->get_results( $request);

这里是回显示例（关键字：YOGA & ART）再次请求 returns 在 phpMyAdmin 中获得所需的结果，但在网站

SELECT DISTINCT SQL_CALC_FOUND_ROWS p.ID, (SELECT meta_value FROM wp_postmeta WHERE post_id = p.ID AND meta_key = 'latitude') AS latitude, (SELECT meta_value FROM wp_postmeta WHERE post_id = p.ID AND meta_key = 'longitude') AS longitude FROM wp_posts p WHERE p.post_type = 'studia' AND (SELECT meta_value FROM wp_postmeta WHERE post_id = p.ID AND meta_key = 'latitude') > 0 AND (SELECT meta_value FROM wp_postmeta WHERE post_id = p.ID AND meta_key = 'longitude') > 0 AND ((SELECT meta_value FROM wp_postmeta WHERE post_id = p.ID AND meta_key = 'mesto' LIMIT 1) LIKE '%YOGA & ART%' OR p.post_title LIKE '%YOGA & ART%' OR (SELECT meta_value FROM wp_postmeta WHERE post_id = p.ID AND meta_key = 'ulice' LIMIT 1) LIKE '%YOGA & ART%' OR (SELECT IF(pm.meta_value LIKE 'a:%',(SELECT post_title FROM wp_posts WHERE ID = SUBSTRING_INDEX(SUBSTRING_INDEX(pm.meta_value,'"',2),'"',-1)), pm.meta_value ) FROM wp_postmeta pm WHERE pm.post_id = p.ID AND meta_key = 'studio' ) LIKE '%YOGA & ART%')

Answer 1

我找到了答案。简单来说，因为我回显了请求，所以显示格式和实际发送的不一样，原来HTML实体&实际上是发送而不是符号&。如此简单的替换解决了我的问题。

$keyword = str_replace("&amp;", "&", $keyword);

wpdb get_results 当关键字包含 & 符号时为空（而同样的请求在 phpMyAdmin SQL 中工作正常）

wpdb get_results is empty when keyword contains ampersand (while the very same request works fine in phpMyAdmin SQL)

php

wordpress

ampersand