Fetching and displaying Data for Each Registered User in PHP using PDO [duplicate]

问题

I have been trying to fetch data from the database and display each user's data on their dashboard, but what is giving me is the whole data in the database. I have tried many fetch data functions but some will give me error. I had check round the web and here to see if I can get something close to mine challenge but I have not been able to get any helpful one.

This is my code

$sql="SELECT * from users";
$query = $pdo -> prepare($sql);
$query->execute();
$results=$query->fetchAll(PDO::FETCH_OBJ);

$cnt=1;
if($query->rowCount() > 1)
{
    foreach($results as $row)
    {

This is the database structure

This is the user dashboard. It should return the data according to the username. Any method of fetch I used will return error.

回答1:

Have your SQL statement query for the columns that you wish your obtain (not sure where your Date data is coming from though).

$statement = $pdo->prepare('SELECT id, username, email FROM users');
$statement->execute();
while($row = $statement->fetch(\PDO::FETCH_ASSOC)) {
    $id = $row['id'];
    $username = $row['username'];
    $email = $row['email'];
    // Validate and do something with this data
}

Also, make sure your syntax is correct. As your example code is not.

Edit:

As mentioned; if you only want data for a specific user, you need to add filtering clauses to your SQL statement.

For example:

$statement = $pdo->prepare('SELECT id, username, email FROM users WHERE id = :id');
$statement->bindValue('id', $someUserId);

来源：https://stackoverflow.com/questions/61280469/fetching-and-displaying-data-for-each-registered-user-in-php-using-pdo

标签

php

mysql

database

pdo