In what scenarios should error_reporting be increased and mysqli_error() be used in conjunction with mysqli functions in PHP for effective troubleshooting?

When troubleshooting issues with MySQL queries in PHP, it can be helpful to increase the error_reporting level to display any potential errors. In conjunction with this, using mysqli_error() can provide detailed error messages from MySQL, helping to pinpoint the issue more effectively.

// Set error reporting level to display all errors
error_reporting(E_ALL);

// Perform a mysqli query
$result = mysqli_query($connection, "SELECT * FROM table");

// Check for errors and display detailed error message
if (!$result) {
    echo "Error: " . mysqli_error($connection);
}