What PHP function should be used to access the currently logged-in username for a database query?

To access the currently logged-in username for a database query in PHP, you can use the `$_SESSION` superglobal to store the username after the user logs in. This way, you can retrieve the username from the session whenever you need it for a database query. 

// Start the session
session_start();

// Store the username in the session after the user logs in
$_SESSION['username'] = $logged_in_username;

// Retrieve the username from the session for a database query
$username = $_SESSION['username'];

// Use the $username variable in your database query
$query = "SELECT * FROM users WHERE username = '$username'";

Keywords

PHP function currently logged-in username database query access

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