What are common pitfalls when using the round() function in PHP?

Common pitfalls when using the round() function in PHP include rounding errors due to floating-point precision and unexpected results when rounding certain numbers. To avoid these issues, it is recommended to use the number_format() function along with round() to ensure accurate rounding of decimal numbers.

$number = 10.555;
$rounded_number = number_format(round($number, 2), 2);
echo $rounded_number; // Output: 10.56