(PHP 5 >= 5.3.0)
gmp_testbit — Tests if a bit is set
$a
, int $index
)Tests if the specified bit is set.
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
Returns TRUE if the bit is set in resource $a,
otherwise FALSE.
An E_WARNING level error is issued when
index is less than zero, and FALSE
is returned.
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));
?>
The above example will output:
bool(false) bool(true)