gmp_testbit
PHP function
Edit on GitHub ✎
(PHP 5 >= 5.3.0, PHP 7, PHP 8)
Tests if a bit is set
Description
gmp_testbit(GMP|int|string $num, int $index): bool
Tests if the specified bit is set.
Parameters
numParameter
indexThe bit to test
Return Values
Returns true if the bit is set in num, otherwise false.
Errors/Exceptions
Throws a ValueError if index is negative or, as of PHP 8.5.0, too large.
Prior to PHP 8.0.0, an E_WARNING was raised and false was returned instead.
Examples
gmp_testbit() example
php
<?php
$n = gmp_init("1000000");
var_dump(gmp_testbit($n, 1));
gmp_setbit($n, 1);
var_dump(gmp_testbit($n, 1));
?>The above example will output:
output
bool(false)
bool(true)