PHP5中文手册·Clear bit -- 追寻梦想＞编程乐园＞PHP 编程

说明

void gmp_clrbit ( resource &$a , int $index )

Clears (sets to 0) bit index in a . The index starts at 0.

参数

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

返回值

A GMP number resource.

范例

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";
?>

上例将输出：

注释

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.


	PHP5中文手册 gmp_and gmp_cmp GMP PHP Manual gmp_clrbit (PHP 4 >= 4.0.4, PHP 5) gmp_clrbit — Clear bit 说明 void gmp_clrbit ( resource `&$a` , int `$index` ) Clears (sets to 0) bit `index` in `a` . The index starts at 0. 参数 `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` It can be either a GMP number resource, or a numeric string given that it is possible to convert the latter to a number. 返回值 A GMP number resource. 范例 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"; ?>` 上例将输出： 254 注释 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. 参见 gmp_setbit() gmp_testbit() gmp_and gmp_cmp GMP PHP Manual

gmp_clrbit

说明

参数

返回值

范例

注释

参见