How Can I Retrieve a Username from a Database Using PHP and MySQLi?

Retrieving Unknown Username from Database Record

The provided database contains a table that links numerical IDs to user information. The goal is to retrieve the username associated with a given ID and store it in the $_SESSION['name'] variable.

To accomplish this, we can perform the following steps:

1. Establish a Database Connection: Establish a connection to the database using mysqli's mysqli_connect function.
2. Prepare the SQL Query: Create an SQL SELECT query that identifies the relevant row in the user table based on the input ID. Replace the ID with a question mark (?) as a placeholder.
3. Prepare the Statement: Prepare the input SQL query using mysqli_prepare. This enables the use of parameterized queries.
4. Bind Variables: Bind the input ID to the placeholder in the prepared statement using mysqli_bind_param.
5. Execute the Statement: Execute the prepared statement using mysqli_execute.
6. Retrieve the Result: Obtain the result set from the statement using mysqli_get_result.
7. Fetch Data: Extract the user record from the result set using fetch_assoc().
8. Store Username in Session: Save the retrieved username to the $_SESSION['name'] variable.

Here is an example implementation of these steps:

// Create database connection
$connection = mysqli_connect('localhost', 'root', '', 'user_data');

// Prepare SQL query
$query = "SELECT * FROM users WHERE>

By following these steps, you can effectively retrieve the username associated with the input ID and store it in the $_SESSION['name'] session variable.

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