gmp_testbit
(PHP 5 >= 5.3.0, PHP 7)
gmp_testbit — Tests if a bit is set
Description
gmp_testbit ( GMP|int|string $num , int $index ) : bool
Tests if the specified bit is set.
Parameters
-
num -
A GMP object, an int or a numeric string.
-
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() - Set bit
- gmp_clrbit() - Clear bit
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https://www.php.net/manual/en/function.gmp-testbit.php