PHP int value is dependent on system

Question

I use same code in different machine.

Ubuntu 64

$test = 51339780210;         
echo (int) $test; die; //result : 51339780210

Centos 32

$test = 51339780210;         
echo (int) $test; die; //result : -199827342

Why these result is different?

Answer 1

How many bits are both systems? This can be the difference between 32-bit system and 64-bit system.

Answer 2

Execute "uname -a" on both systems. I'd assume the ubuntu says something with x86_64, which means it's 64 bit, while Centos says i686, which is 32 bit.

Answer 3

From PHP manual:

   The size of an integer is platform-dependent ...