Php/docs/function.gmp-testbit
来自菜鸟教程
gmp_testbit
(PHP 5 >= 5.3.0, PHP 7)
gmp_testbit — Tests if a bit is set
返回值
Returns true
if the bit is set in resource $a
,
otherwise false
.
错误/异常
An E_WARNING
level error is issued when
index
is less than zero, and false
is returned.
范例
Example #1 gmp_testbit() example
<?php$n = gmp_init("1000000");var_dump(gmp_testbit($n, 1));gmp_setbit($n, 1);var_dump(gmp_testbit($n, 1));?>
以上例程会输出:
bool(false) bool(true)