What best practices should be followed when dealing with decimal values in PHP?

When dealing with decimal values in PHP, it is recommended to use the `number_format()` function to format the decimal numbers to a specified number of decimal places. This function helps ensure that the decimal values are displayed correctly without any unexpected rounding errors. Additionally, using the `round()` function with the appropriate precision can help in performing accurate calculations with decimal values.

// Formatting a decimal number to 2 decimal places
$decimalValue = 10.56789;
$formattedValue = number_format($decimalValue, 2);
echo $formattedValue; // Output: 10.57

// Performing accurate calculations with decimal values
$number1 = 10.25;
$number2 = 5.75;
$sum = round($number1 + $number2, 2);
echo $sum; // Output: 16.00