gmp_testbit
Tests if a bit is set
Description
bool gmp_testbit(GMPintstring $num, int $index)
Parameters
-
num
-
A GMP object, an int,
or a string that can be interpreted as a number following the same logic
as if the string was used in gmp_init with automatic
base detection (i.e. when base is equal to 0).
-
index
-
The bit to test
Return Values
Returns true if the bit is set in num,
otherwise false.
Errors/Exceptions
An E_WARNING level error is issued when
index is less than zero, and false
is returned.
Examples
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: