bcpowmod

Description

Use the fast-exponentiation method to raise x to the power y with respect to the modulus modulus. The optional scale can be used to set the number of digits after the decimal place in the result.

The following two statements are functionally identical. The bcpowmod() version however, executes in less time and can accept larger parameters.

<?php
$a = bcpowmod($x,$y,$mod);

$b = bcmod(bcpow($x,$y),$mod);

/* $a and $b are equal to each other. */
?>

See also bcpow(), and bcmod().