gmp_testbit

Tests if a bit is set

Description

bool gmp_testbit ( GMP $a , int $index )

Tests if the specified bit is set.

Parameters

a: Either a GMP number resource in PHP 5.5 and earlier, a GMP object in PHP 5.6 and later, or a numeric string provided that it is possible to convert the latter to a number.
index: The bit to test

Return Values

Returns TRUE if the bit is set in resource $a, 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:

bool(false)
bool(true)

See Also

gmp_setbit
gmp_clrbit