MYSQLI_NUM是什么意思和做什么? [英] What does MYSQLI_NUM mean and do?

问题描述

我只想了解MYSQLI_NUM的一些信息.它是PHP还是MySQL的一部分.

I just wanted a little bit of information on MYSQLI_NUM. And is it part of PHP or MySQL.

推荐答案

MYSQLI_NUM是PHP中与mysqli_result相关联的常量.如果使用mysqli从数据库中检索信息，则可以使用MYSQLI_NUM指定数据的返回格式.具体来说，当使用fetch_array函数时，MYSQLI_NUM指定返回数组应对该数组使用数字键，而不是创建关联数组.假设您的数据库表中有两个字段"first_field_name"和"second_field_name"，内容分别为"first_field_content"和"second_field_content" ...

MYSQLI_NUM is a constant in PHP associated with a mysqli_result. If you're using mysqli to retrieve information from the database, MYSQLI_NUM can be used to specify the return format of the data. Specifically, when using the fetch_array function, MYSQLI_NUM specifies that the return array should use numeric keys for the array, instead of creating an associative array. Assuming you have two fields in your database table, "first_field_name" and "second_field_name", with the content "first_field_content" and "second_field_content"...

$result->fetch_array(MYSQLI_NUM);

按以下方式获取结果的每一行:

fetches each row of the result like this:

array(
    0 => "first_field_content",
    1 => "second_field_content"
);

或者...

$result->fetch_array(MYSQLI_ASSOC);

获取这样的数组:

array(
    "first_field_name" => "first_field_content",
    "second_field_name" => "second_field_content"
);

使用常量MYSQLI_BOTH将同时获取两者.

Using the constant MYSQLI_BOTH will fetch both.

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