gmp_testbit

(PHP 5 >= 5.3.0, PHP 7)

gmp_testbit — Tests if a bit is set

说明

gmp_testbit ( GMP $a , int $index ) : bool

Tests if the specified bit is set.

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 bit to test

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)

参见

相关文章
php gmp 函数 clear bitphp gmp 函数 check if number is probably prime php gmp 函数 set bitphp gmp 函数 tests if a bit is setphp mcve 函数 check to see if a transaction has completedphp mcve 函数 set certificate key files and certificates if server requires client certificate verificationphp maxdb 函数 set optionsphp ncurses 函数 set cursor statephp pdf 函数 set horizontal text scaling deprecated php pdf 函数 set fill and stroke colorphp pdf 函数 set fill and stroke rgb color values deprecated php posix 函数 return the group set of the current processphp posix 函数 set the effective gid of the current processphp runkit 函数 determines if the current functions return value will be usedphp stream 函数 set the default stream contextphp svn 函数 abort a transaction returns true if everything is okay false otherwisephp sybase 函数 get number of rows in a result setphp mongodb driver server checks if this server is a primary member of a replica setphp sdo 函数 test whether a property was set prior to being modifiedphp sdo 函数 test to see if this sdo model type is a primitive data type
关注编程学问公众号