How to divide numbers without remainder in PHP?

Question

How does one divide numbers but exclude the remainder in PHP?

Answer 1

In addition to decisions above like $result = intval($a / $b) there is one particular case:

If you need an integer division (without remainder) by some power of two ($b is 2 ^ N) you can use bitwise right shift operation:

$result = $a >> $N;

where $N is number from 1 to 32 on 32-bit operating system or 64 for 64-bit ones.

Sometimes it's useful because it's fastest decision for case of $b is some power of two.

And there's a backward (be careful due to overflow!) operation for multiplying by power of two:

$result = $a << $N;

Hope this helps for someone too.