gmp_clrbit
(PHP 4 >= 4.0.4, PHP 5)
gmp_clrbit — Clear bit
Description
void gmp_clrbit
( resource
$a
, int $index
)
Clears (sets to 0) bit index in
a. The index starts at 0.
Parameters
-
a -
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 index of the bit to clear. Index 0 represents the least significant bit.
Return Values
A GMP number resource.
Examples
Example #1 gmp_clrbit() example
<?php
$a = gmp_init("0xff");
gmp_clrbit($a, 0); // index starts at 0, least significant bit
echo gmp_strval($a) . "\n";
?>
The above example will output:
254
Notes
Note:
Unlike most of the other GMP functions, gmp_clrbit() must be called with a GMP resource that already exists (using gmp_init() for example). One will not be automatically created.
- PHP Руководство
- Функции по категориям
- Индекс функций
- Справочник функций
- Математические расширения
- GNU Вычисления с увеличенной точностью
- gmp_abs
- gmp_add
- gmp_and
- gmp_clrbit
- gmp_cmp
- gmp_com
- gmp_div_q
- gmp_div_qr
- gmp_div_r
- gmp_div
- gmp_divexact
- gmp_export
- gmp_fact
- gmp_gcd
- gmp_gcdext
- gmp_hamdist
- gmp_import
- gmp_init
- gmp_intval
- gmp_invert
- gmp_jacobi
- gmp_legendre
- gmp_mod
- gmp_mul
- gmp_neg
- gmp_nextprime
- gmp_or
- gmp_perfect_square
- gmp_popcount
- gmp_pow
- gmp_powm
- gmp_prob_prime
- gmp_random_bits
- gmp_random_range
- gmp_random_seed
- gmp_random
- gmp_root
- gmp_rootrem
- gmp_scan0
- gmp_scan1
- gmp_setbit
- gmp_sign
- gmp_sqrt
- gmp_sqrtrem
- gmp_strval
- gmp_sub
- gmp_testbit
- gmp_xor
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