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gmp_testbit

(No version information available, might be only in CVS)

gmp_testbit — Tests if a bit is set

说明

bool gmp_testbit ( resource $a , int $index )

Tests if the specified bit is set.

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

The bit to test

返回值

如果成功则返回 TRUE,失败则返回 FALSE

错误/异常

E_WARNING is issued when index is less than zero.

范例

Example#1 gmp_testbit() example

<?php
$n 
gmp_init("1000000");
var_dump(gmp_testbit($n1));
gmp_setbit($n1);
var_dump(gmp_testbit($n1));
?>

上例将输出:

bool(false)
bool(true)


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