Create GMP number

说锟斤拷

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

Creates a GMP number from an integer or string.

锟斤拷锟斤拷

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.

锟斤拷锟斤拷值

GMP 锟斤拷值锟斤拷源.

锟斤拷锟斤拷锟斤拷志

锟芥本	说锟斤拷
5.3.2	The `base` was extended from 2 to 36, to 2 to 62 and -2 to -36.

注锟斤拷

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

锟斤拷锟斤拷

Example #1 Creating GMP number


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

注锟斤拷

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().