Are there any specific guidelines or rules to keep in mind when deciding whether to handle calculations in PHP or MySQL for optimal efficiency and maintainability?

When deciding whether to handle calculations in PHP or MySQL, consider factors such as the complexity of the calculation, the amount of data being processed, and the performance implications of each approach. In general, simple calculations that involve a small amount of data can be efficiently handled in PHP, while more complex calculations or operations on large datasets may be better suited for MySQL.

// Example of handling a simple calculation in PHP
$number1 = 10;
$number2 = 20;
$result = $number1 + $number2;

echo "The result of the calculation is: " . $result;