PHP int 64 bit turns scientific notation way below its maximum value

Asked Sep 23 '16 at 13:48

Active Sep 23 '16 at 13:48

Viewed 150 times

My PHP environment is 64 bit:

echo PHP_INT_MAX;
    9223372036854775807

So I thought I could operate with integer values lower than PHP_INT_MAX value.

But this code:

echo (517002.962 * 1000000000);

gives this result:

5.17002962E+14

So, I am confused. If 5.17002962E+14 is lower than PHP_INT_MAX (9223372036854775807), why does PHP convert it to scientific notation?

asked Sep 23 '16 at 13:48

2

float * integer = float – Mark Baker Sep 23 '16 at 13:49
Thx. I think you are right! – Juan Ignacio Pérez Sacristán Sep 23 '16 at 13:50
1

PS: Unless you using PHP7 then even 64 bit PHP does not actually support true 64bit integers – RiggsFolly Sep 23 '16 at 13:51
Whatever you do, if the accuracy of these calculations matter then you should really consider the [BC Math Library](http://php.net/manual/en/ref.bc.php) – MonkeyZeus Sep 23 '16 at 14:29
@PaulCrovella Yup you are right, aplogise profusely. There, I have been exposed as a Windows User. How will I ever live it down! :) My _Street cred is destroyed_ :) :( – RiggsFolly Sep 23 '16 at 14:42

0 Answers0