gmp_init
(PHP 4 >= 4.0.4, PHP 5, PHP 7)
gmp_init — Create GMP number
Description
GMP gmp_init
(
mixed $number
[,
int $base
= 0
] )
Parameters

number

An integer or a string. The string representation can be decimal,
hexadecimal or octal.

base

The base.
The base may vary from 2 to 36. If base is 0 (default value), the
actual base is determined from the leading characters: if the first
two characters are 0x or 0X,
hexadecimal is assumed, otherwise if the first character is "0",
octal is assumed, otherwise decimal is assumed.
Return Values
A GMP number resource in PHP 5.5 and earlier, or a GMP object in PHP 5.6 and later.
Notes
Note:
To use the extended base introduced in PHP 5.3.2, then
PHP must be compiled against GMP 4.2.0 or greater.
Examples
Example #1 Creating GMP number
<?php
$a = gmp_init(123456);
$b = gmp_init("0xFFFFDEBACDFEDF7200");
?>
Notes
Note:
It is not necessary to call this function in order to use integers or
strings in place of GMP numbers in GMP functions (such as with
gmp_add()). Function arguments are automatically
converted to GMP numbers, if such conversion is possible and needed, using
the same rules as gmp_init().