Description:
------------
An example is better than any explanation:

In 64 bits system :

var_dump(strtotime("1115418006")) returns int(3457934838000)

In 32 bits system : 

var_dump(strtotime("1115418006")) returns int(-1)



I know that it SHOULD return -1, but returning 3457934838000 is absolutely false.
The result differs, wether we are in a 32 bits system or on a 64 bits.

Reproduce code:
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<?php

// This works on 64bits system, with PHP compiled in 64bits too

var_dump(strtotime("1115418006"));


Expected result:
----------------
echoes :
int(-1)

Actual result:
--------------
int(3457934838000)