PHP 5.4.33 Released

gmp_clrbit

(PHP 4 >= 4.0.4, PHP 5)

gmp_clrbitClear bit

说明

void gmp_clrbit ( GMP $a , int $index )

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

参数

a

可以是一个 GMP 数据 resouce,或一个可以转换为数值的字符串。

index

The index of the bit to clear. Index 0 represents the least significant bit.

返回值

GMP 数值资源.

范例

Example #1 gmp_clrbit() example

<?php
$a 
gmp_init("0xff");
gmp_clrbit($a0); // index starts at 0, least significant bit
echo gmp_strval($a) . "\n";
?>

以上例程会输出:

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

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