Typecho教程 - 获取模板自定义字段值

public function getCustom($cid, $key){
    $db = Typecho_Db::get();
    $rows = $db->fetchAll($db->select('table.fields.str_value')->from('table.fields')
        ->where('table.fields.cid = ?', $cid)
        ->where('table.fields.name = ?', $key)
    );
    // 如果有多个值则存入数组
    foreach ($rows as $row) {
        $img = $row['str_value'];
        if (!empty($img)) {
            $values[] = $img;
        }
    }
    return $values;
}