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Описание

void gmp_setbit ( resource &$a , int $index [, bool $set_clear= true ] )

Sets bit index in a .

Список параметров

a

The number being set to.

It can be either a GMP number resource, or a numeric string given that it is possible to convert the latter to a number.

index

The set bit.

set_clear

Defines if the bit is set to 0 or 1. By default the bit is set to 1. Index starts at 0.

Возвращаемые значения

A GMP number resource.

Примеры

Пример #1 gmp_setbit() example


<?php
$a = gmp_init("0xfd");
gmp_setbit($a, 1); // index starts at 0
echo gmp_strval($a) . "\n";
?>

Результат выполнения данного примера:

Примечания

Замечание: Unlike most of the other GMP functions, gmp_setbit() must be called with a GMP resource that already exists (using gmp_init() for example). One will not be automatically created.

Смотрите также

gmp_clrbit() - Clear bit
gmp_testbit() - Tests if a bit is set