What are the best practices for handling decimal values in PHP to avoid precision errors?

When working with decimal values in PHP, it is important to use the appropriate data type to avoid precision errors. One common solution is to use the `BCMath` extension, which provides arbitrary precision arithmetic functions for working with decimal numbers. By using these functions, you can perform accurate calculations without losing precision.

// Example of using BCMath extension to handle decimal values
$number1 = '1.23456789';
$number2 = '9.87654321';

$sum = bcadd($number1, $number2, 8); // Adding two decimal numbers with precision of 8
echo $sum; // Output: 11.11111110