Create GMP number gmp_init

(PHP 4 >= 4.0.4, PHP 5, PHP 7)

gmp_init — Create GMP number

说明

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

Creates a GMP number from an integer or string.

参数

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 are0xor0X, hexadecimal is assumed, otherwise if the first character is "0", octal is assumed, otherwise decimal is assumed.

返回值

GMP 数值资源.

更新日志

版本说明
5.3.2Thebasewas extended from 2 to 36, to 2 to 62 and -2 to -36.

注释

To use the extended base introduced in PHP 5.3.2, then PHP must be compiled against GMP 4.2.0 or greater.

范例

Example #1 Creating GMP number

<?php
$a = gmp_init(123456);
$b = gmp_init("0xFFFFDEBACDFEDF7200");
?>

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注释

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 withgmp_add()). Function arguments are automatically converted to GMP numbers, if such conversion is possible and needed, using the same rules asgmp_init().