Introduction
These functions allow you to work with arbitrary-length integers
using the GNU MP library.
These functions have been added in PHP 4.0.4.
Note:
Most GMP functions accept GMP number arguments, defined as
resource below. However, most of these
functions will also accept numeric and string arguments, given
that it is possible to convert the latter to a number. Also,
if there is a faster function that can operate on integer arguments,
it would be used instead of the slower function when the supplied arguments are
integers. This is done transparently, so the bottom line is that
you can use integers in every function that expects GMP
number. See also the gmp_init() function.
Warning
If you want to explicitly specify a large integer,
specify it as a string. If you don't do that, PHP will
interpret the integer-literal first, possibly resulting
in loss of precision, even before GMP
comes into play.
Note:
This extension is available on Windows platforms since PHP 5.1.0.
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