What best practices should PHP developers follow when working with mathematical calculations and formulas in their code?

When working with mathematical calculations and formulas in PHP, it is important for developers to ensure precision and accuracy. One common issue is floating-point arithmetic errors that can occur due to the way computers represent numbers. To mitigate this issue, developers should use PHP's built-in functions for mathematical operations and consider using libraries like BCMath or GMP for arbitrary precision arithmetic. 

// Example of using BCMath library for arbitrary precision arithmetic
$number1 = '12345678901234567890.1234567890';
$number2 = '98765432109876543210.9876543210';

$sum = bcadd($number1, $number2, 10);
echo $sum;

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mathematical calculations formulas PHP developers code functions

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