How to convert float value to integer in php?

Question

What do you mean by converting?

casting*: (int) $float or intval($float)
truncating: floor($float) (down) or ceil($float) (up)
rounding: round($float) – has additional modes, see PHP_ROUND_HALF_... constants

*: casting has some chance, that float values cannot be represented in int (too big, or too small), f.ex. in your case.

PHP_INT_MAX: The largest integer supported in this build of PHP. Usually int(2147483647).

But, you could use the BCMath, or the GMP extensions for handling these large numbers. (Both are boundled, you only need to enable these extensions)