What are the best practices for handling and formatting decimal numbers in PHP to ensure accuracy and precision in calculations?

When working with decimal numbers in PHP, it is important to use the appropriate functions and methods to ensure accuracy and precision in calculations. One common practice is to use the `number_format()` function to format the decimal numbers to a specified number of decimal places. Additionally, using the `round()` function with the appropriate precision can help avoid rounding errors in calculations.

// Example of formatting a decimal number to 2 decimal places
$number = 10.56789;
$formatted_number = number_format($number, 2);
echo $formatted_number;

// Example of rounding a decimal number to 2 decimal places
$number = 10.56789;
$rounded_number = round($number, 2);
echo $rounded_number;