What is the potential issue with using MySQL in a variable only within a while loop in PHP?

When using MySQL in a variable within a while loop in PHP, the potential issue is that the connection to the database may remain open even after the loop has finished executing, leading to resource leaks and potential performance issues. To solve this problem, it is important to close the MySQL connection after the loop has completed.

// Establish a connection to the MySQL database
$connection = mysqli_connect("localhost", "username", "password", "database");

// Execute a query and fetch results within a while loop
$query = "SELECT * FROM table";
$result = mysqli_query($connection, $query);

while($row = mysqli_fetch_assoc($result)) {
    // Process each row
}

// Close the MySQL connection after the loop
mysqli_close($connection);