How does using strings instead of integers for numerical operations impact PHP code performance?

Using strings instead of integers for numerical operations can impact PHP code performance because PHP has to convert the strings to integers before performing the operations. This conversion process can be slower and more resource-intensive compared to directly using integers. To improve performance, it is recommended to use integers for numerical operations whenever possible.

// Using integers instead of strings for numerical operations
$num1 = 10;
$num2 = 5;

$result = $num1 + $num2;

echo $result;