How to Retrieve Unknown Usernames from Known IDs Using MySQLi?

Retrieving Unknown Usernames from Known IDs

Given a numerical ID of significant length, your task is to retrieve the corresponding username from a database. Let's delve into the code and provide a solution.

The initial approach attempted to execute a SQL query using mysqli. However, there were errors in binding the variables to the parameters.

To rectify this, the following steps are crucial:

• Formulate a SELECT statement with placeholders or parameters instead of variables.
• Prepare the query with mysqli::prepare().
• Use bind_param() to associate variables with the prepared statement.
• Execute the statement with execute().
• Extract the mysqli result variable using get_result().
• Finally, fetch the data with mysqli_result::fetch_assoc().

The optimized code now resembles:

$sql = "SELECT * FROM users WHERE>

Once the data is fetched, the username can be stored in the session variable:

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

By following these steps, you can efficiently retrieve usernames associated with unknown IDs from a database using mysqli.

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