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How to Retrieve a Username from a MySQL Database Using PHP Given a User ID?

Susan Sarandon
Susan SarandonOriginal
2024-12-14 15:44:13516browse

How to Retrieve a Username from a MySQL Database Using PHP Given a User ID?

Retrieving an Unknown Username from an ID Using MySQL and PHP

Given a unique ID, the task is to retrieve the associated username from a database using MySQL and PHP. The username should be stored in the $_SESSION['name'] variable.

Steps to Perform the Query:

  1. Create the MySQL Query:

    SELECT username FROM user_data WHERE id = ?

    where ? is a placeholder for the ID.

  2. Prepare the Query:

    $stmt = $conn->prepare("SELECT username FROM user_data WHERE>
  3. Bind the ID Variable:

    $stmt->bind_param("s", $id);

    where s indicates the data type as a string.

  4. Execute the Query:

    $stmt->execute();
  5. Get the Result:

    $result = $stmt->get_result();
  6. Fetch the Data:

    $user = $result->fetch_assoc();
  7. Store the Username in the Session Variable:

    $_SESSION['name'] = $user['username'];

Example Code:

<?php
$conn = mysqli_connect('localhost', 'root', '', 'user_data');
$id = '10527391670258314752';

$sql = "SELECT username FROM user_data WHERE>

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