Float to bigint - php

Question

Ok, so I have this float number :-
$floatval = '1.05143617E+18';
It's equivalent integer is :-
1051436170000000000
Using php, I'm trying to convert this float number to the required integer value.
Here is my try :-
$floatval = '1.05143617E+18';
var_dump(convert($floatval));
function convert($floatval)
{
$divided = explode('+', $floatval);
$first = floatval($divided[0]);
$second = intval($divided[1]);
$final = intval($first * pow(10, $second));
return $final;
}
Output :-
953738112
Whatever I try, the output is not coming as required. Where am I doing mistake?

Answer 1

Try this
intval(floatval($floatval));

Answer 2

It appears you are dealing with integer overflow, probably because you are running PHP on Windows and your system does not support 64 bit integers. You can avoid this issue by doing your calculations with functions from the bcmath extension. If you are running on Windows, PHP will have built-in support for bcmath as noted in the documentation here. Using bcmath, Your convert function could be implemented like this:
function convert($floatval)
{
$divided = explode('E+', $floatval);
$base = $divided[0];
$exp = $divided[1];
$final = bcmul($base, bcpow('10', $exp));
return $final;
}
On a different system where you did not have the integer overflow problem, one of the other cast-based solutions should work.

Answer 3

$floatval = (float) '1.05143617E+18';
$intval = (int) $floatval;
var_dump($intval);
Output: int(1051436170000000000)

Answer 4

(int)(float)$floatval; does the trick.