How can the use of functions in PHP scripts affect the execution of SQL queries for database updates?

When using functions in PHP scripts to handle database updates, it's important to ensure that the database connection is properly handled within the function. If the database connection is not passed as a parameter to the function or if a new connection is established within the function, it can lead to inefficiency and potential connection errors. To solve this issue, pass the database connection as a parameter to the function so that the same connection is used throughout the script execution.

// Function to update database using a passed database connection
function updateDatabase($connection, $data) {
    $sql = "UPDATE table SET column = :data";
    $stmt = $connection->prepare($sql);
    $stmt->bindParam(':data', $data);
    $stmt->execute();
}

// Establish database connection
$connection = new PDO("mysql:host=localhost;dbname=mydatabase", "username", "password");

// Call the function with the database connection
updateDatabase($connection, $data);