Php 不同的mysql查询取决于复选框

尝试创建搜索功能，取决于它可以找到文章标题、文本和标签的复选框

这是我的函数，但它对DB使用了多个请求，我正在尝试发出w/一个请求；）

我在DB中有3个表：articles-id，text；标签-id、名称；articles\u tag\u rel-article\u id，tag\u id

如何更好地检查用户单击的复选框，以及如何构建查询以获得带有1个请求的文章

泰

UPD：我自己做的：）这是新版本：

/**
 * Search articles by text/title/tags depends on checkboxes values
 * @param array $data of checkboxes values, keys can be 'tag'/'title'/'text'
 * @return array $articles of non-repeat articles
 */
public function search_articles($data)
{
    $str = "";
    if (isset($data['tag'])) {
        $this->db
                ->select('articles.*')
                ->from('articles')
                ->from('tags')
                ->from('articles_tags_rel')
                ->where('articles.id = articles_tags_rel. article_id')
                ->where('articles_tags_rel.tag_id = tags.id')
                ->where('tags.name', $data['tag']);
        $str = $this->db->get_compiled_select();
        unset($data['tag']);
    }
    foreach ($data as $key => $value) {
            $this->db
                    ->select('*')->from('articles')
                    ->like($key, $value);
            $str .= (!$str) ? $this->db->get_compiled_select() : " UNION ". $this->db->get_compiled_select();
    }
    $articles = $this->db->query($str)->result_array();
    return $articles;
}

/**
 * Search articles by text/title/tags depends on checkboxes values
 * @param array $data of checkboxes values, keys can be 'tag'/'title'/'text'
 * @return array $articles of non-repeat articles
 */
public function search_articles($data)
{
    $str = "";
    if (isset($data['tag'])) {
        $this->db
                ->select('articles.*')
                ->from('articles')
                ->from('tags')
                ->from('articles_tags_rel')
                ->where('articles.id = articles_tags_rel. article_id')
                ->where('articles_tags_rel.tag_id = tags.id')
                ->where('tags.name', $data['tag']);
        $str = $this->db->get_compiled_select();
        unset($data['tag']);
    }
    foreach ($data as $key => $value) {
            $this->db
                    ->select('*')->from('articles')
                    ->like($key, $value);
            $str .= (!$str) ? $this->db->get_compiled_select() : " UNION ". $this->db->get_compiled_select();
    }
    $articles = $this->db->query($str)->result_array();
    return $articles;
}