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(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)