The calculations in PHP and calculator are different

Question

When I calculate in php

print (2224516644% (pow (2,16) + 1));

the result is -5748.

While in the calculator the result is 59790

Why ? I need help

You are experiencing integer overflow http://php.net/manual/en/language.types.integer.php. Are you running on a 32-bit or 64-bit host? — TVA van Hesteren, Nov 06 '17 at 13:15
Just ran that under PHP 7 and PHP 5.6 and it gives me the correct result : **59790** -- try it yourself: http://sandbox.onlinephpfunctions.com/code/fa815664126bd6a1a49c7750f3c24b5a21ac7c29 — teeyo, Nov 06 '17 at 13:15
You should use 64bit system to allow larger numbers. It seems You are running on 32bit. See integer overflow: http://php.net/manual/en/language.types.integer.php#language.types.integer.overflow — PeterM, Nov 06 '17 at 13:19
@TVAvanHesteren I've been using a 64-bit,,but still can not. — Eka Daryanto Putra, Nov 07 '17 at 03:03
@EkaDaryantoPutra, thats because you have an integer overflow. The max int value is `2147483647` I believe — TVA van Hesteren, Nov 07 '17 at 08:30
You might try to generate the number you are looking for as a product of two other numbers which are not overflowing. But I'm not quite sure how PHP handles this — TVA van Hesteren, Nov 08 '17 at 18:53

score 6 · Accepted Answer · answered Nov 06 '17 at 13:14

6

answered Nov 06 '17 at 13:14

It works fine for me : http://sandbox.onlinephpfunctions.com/code/fa815664126bd6a1a49c7750f3c24b5a21ac7c29 , I think it has to do with his host – teeyo Nov 06 '17 at 13:16

1 Answers1