gmp_setbit

(PHP 4 >= 4.0.4, PHP 5)

gmp_setbit — Imposta bit

Descrizione

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

Sets bit index in a. set_clear definisce se il bit è settato su 0 o su 1. Di default il bit è settato a 1.

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bluej100@gmail ¶

5 years ago


The third parameter is somewhat confusingly named; it would probably be better described as "$set_state". If true, it sets the bit to 1. If false, it sets the bit to 0. Default is true.



<?php

$num = gmp_init(1);

gmp_setbit($num, 1);

echo 'gmp_setbit(1, 1): '.gmp_strval($num, 2)."\n"; // 11



$num = gmp_init(1);

gmp_setbit($num, 1, true);

echo 'gmp_setbit(1, 1, true): '.gmp_strval($num, 2)."\n"; // 11



$num = gmp_init(1);

gmp_setbit($num, 0, false);

echo 'gmp_setbit(1, 0, false): '.gmp_strval($num, 2)."\n"; // 0

?>

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