PHP Modulus with Overflow Integer

Question

I get integer overflow value 7.233907357909E+16 from multiplication.

Now i need to calculate modulus 7.233907357909E+16 % 15.

How can i solve it, any idea how to do this?

• user2541120: How are you getting these values at first place
• Mark Baker: You could use the PHP's fmod() function
• Daniel Fischer: Take the modulus before multiplying. Once you've left the range where integers are exactly represented, you've lost the information.

Answer 1

You should look into bcmul and bcmod for arbitrary precision computations.

Example:

$res = bcmul('134334244395933282', '2834783723423487283');
$modRes = bcmod($res, '15');
echo $modRes;