获取插入行的行数据(Mysql，PHP，mysqli)

问题描述

插入时，我需要找回行的postid(自动递增PK).

I need to get back the postid (auto-incrementing PK) of a row when i insert it.

我目前正在使用它来获取它

I am currently using this to get it

//get postid to return
if($result = $db -> query('SELECT postid FROM posts WHERE title = \''.$title.'\' LIMIT 1')){
        $row = $result->fetch_assoc();
        $json['postid']  = $row['postid'];
        $result->free();

其中$ title是新插入的帖子的标题名称.

where $title is the title name of the newly-inserted post.

mysqli类的一部分是否可以让我在一个查询中执行此操作? $ db-> query()是否返回任何信息，以使此操作更简单，更安全?

Is there part of the mysqli class that will allow me to do this in one query?? Does $db -> query() return any information that will make this simpler and more secure?

我尝试浏览mysqli文档，但是找不到我想要的东西.我确定它在某处.

I have tried looking through the mysqli documentation, but I could not find what i wanted. I'm sure it is there somewhere.

多个标题会搞砸这一点，尽管不允许使用，但您不能太安全

Multiple titles will screw this up, and although they are not allowed, you cant be too safe

推荐答案

您的表中是否有AUTO_INCREMENT列?如果是这样，您可以使用 mysql_insert_id() 或 mysqli->insert_id 获取该值，然后使用它选择该行. 此处有更多信息.

Does your table have an AUTO_INCREMENT column? If so you can use mysql_insert_id() or mysqli->insert_id to get that value, and then use it to select the row. More info here.

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