PHP - Large Integer mod calculation

Question

I need to calculate modulus with large number like :

<?php

    $largenum = 95635000009453274121700;

    echo $largenum % 97;

?>

It's not working... because $largenum is too big for an int in PHP.

Any idea how to do this ?

Answer 1

Use bcmod() from BCMath Arbitrary Precision Mathematics:

$largenum = '95635000009453274121700';
echo bcmod($largenum, '97');

Note, that $largenum is passed as a string, not converted to int.