PHP Manual: Create GMP number

Description

GMP gmp_init ( mixed $number [, int $base = 0 ] )

Creates a GMP number from an integer or string.

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.

Changelog

Version	Description
5.3.2	The `base` was extended from 2 to 36, to 2 to 62 and -2 to -36.

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.