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gmp_testbit

(PHP 5 >= 5.3.0)

gmp_testbitTests if a bit is set

Description

bool gmp_testbit ( resource $a , int $index )

Tests if the specified bit is set.

Parameters

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

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
$n 
gmp_init("1000000");
var_dump(gmp_testbit($n1));
gmp_setbit($n1);
var_dump(gmp_testbit($n1));
?>

The above example will output:

bool(false)
bool(true)

See Also

PHP Manual