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PHP – Large Integer mod calculation

Posted by: admin July 12, 2020 Leave a comment

Questions:

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 ?

How to&Answers:

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.