How can PHP developers ensure accurate rounding of numbers for graph scaling without errors?

To ensure accurate rounding of numbers for graph scaling without errors, PHP developers can use the `round()` function with the appropriate precision parameter. By specifying the number of decimal places to round to, developers can avoid floating-point precision issues that may arise when working with numbers in PHP.

$number = 123.456789;
$rounded_number = round($number, 2); // Round to 2 decimal places
echo $rounded_number;