使用PDO选择登录的用户ID [英] Select logged in user's ID using PDO

问题描述

我不熟悉PDO，并且想知道如何从phpMyAdmin数据库中选择登录用户的ID.

I am new to using PDO and was wondering how I would select the logged in user's id from my phpMyAdmin database.

我的初始化文件是...

My initialization file is...

session_start();

$_SESSION['user_id'] = 1;

$db = new PDO('mysql:host=localhost;dbname=project', 'root', '');

这是我的用户表布局:

推荐答案

我假设您要获取用户的信息，这些用户的id与user_id

I'm assuming you want to get the users info where their id is the same as user_id

您可能会做类似的事情；

You might do something like this;

$query = $db->prepare('SELECT * FROM table WHERE id=:id');
//using bindParam helps prevent SQL Injection
$query->bindParam(':id', $_SESSION['user_id']);
$query->execute();
//$results is now an associative array with the result
$result = $query->fetch(PDO::FETCH_ASSOC);

我不确定如何设置user_id，所以我只是使用bindParam以防万一.

I wasn't sure how user_id is set so I just used bindParam just in case.

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