(PHP 4 >= 4.0.4, PHP 5, PHP 7)
Raise number into power with modulo
GMP gmp_powm ( GMP $base, GMP $exp, GMP $mod )
Calculate (base raised into power exp) modulo mod. If exp is negative, result is undefined.
Parameters:
base
The base number.
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.
exp
The positive power to raise the base.
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.
mod
The modulo.
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.
Returns:
The new (raised) number, as a GMP number.
Examples:
gmp_powm() example
<?php
$pow1 = gmp_powm("2", "31", "2147483649");
echo gmp_strval($pow1) . "\n";
?>
The above example will output:
2147483648
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