gmp_testbit

Tests if a bit is set ()
bool gmp_testbit ( resource 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 on success or FALSE on failure.

E_WARNING is issued when index is less than zero.

<?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)

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