How can developers effectively troubleshoot and debug issues related to mysqli functions in PHP?

To effectively troubleshoot and debug issues related to mysqli functions in PHP, developers can start by checking for any error messages or warnings generated by the mysqli functions. They can also enable error reporting to display any potential issues. Additionally, developers can use functions like mysqli_error() to retrieve detailed error messages for debugging purposes.

// Enable error reporting
error_reporting(E_ALL);
ini_set('display_errors', 1);

// Connect to the database
$mysqli = new mysqli("localhost", "username", "password", "database");

// Check for connection errors
if ($mysqli->connect_error) {
    die("Connection failed: " . $mysqli->connect_error);
}