ThinkPHP查询中的魔术方法简述_PHP
ThinkPHP
我们在使用thinkphp开发的时候,有时候会用到getById('1')这个方法快速的获取一条信息的内容,这个方法比用where(" id =1 ")->find()好用多了,同时查询效率也比find快速。
很多人在刚开始接触这个方法的时候,没有多留意它的内部实现机制,仅仅认为是通过id来获取信息,而事实并非如此。
例如有的系统里存在getByTitle("nihao")、getByMoney('1000')这类方法,这些与刚才提到的getById('1')很相似,同时实现的功能原理也与getById('1')一样。
其实类似这种getById($id)、getByTitle($title)、getByUserName($username)等等,以“getBy+字段”的方法有个专有名词叫做“魔术方法”,它后面的字段可以是数据表中的任何一个字段,返回结果只能是查询出来的第一条数据,这种方法查询的效率很高,很好记住。
有时候我们的字段不是连起来的,例如:user_name 这样子的字段,我们是不是这样子写(getByUser_name($name))呢?答案是否定的,thinkphp中不支持这样子的方法,我们需要使用驼峰法来命名,应该写成这样 getByUserName($name)就可以了!

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