Create GMP number

说明

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

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 are 0x or 0X, 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
5.3.2	The `base` was extended from 2 to 36, to 2 to 62 and -2 to -36.
4.1.0	The optional `base` parameter was added.

注释

Note:
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");
?>

注释

Note:
It is not necessary to call this function if you want to use integer or string in place of GMP number in GMP functions, like gmp_add(). Function arguments are automatically converted to GMP numbers, if such conversion is possible and needed, using the same rules as gmp_init().