useful recursive PHP functions

recursively ...

• ... scan directory scan a directory recursively with PHP
• ... delete directory remove directory recursively with PHP
• ... get size get filesize of directory and all files within
• ... do whatever PHP can do recursively handle data with PHP

PHP Manual for

gmp_powm

(PHP 4 >= 4.0.4)

gmp_powm -- Raise number into power with modulo

Description

resource gmp_powm ( resource base, resource exp, resource mod)

Calculate ( base raised into power exp ) modulo mod . If exp is negative, result is undefined.

Example 1. gmp_powm() example

<?php
$pow1 = gmp_powm("2", "31", "2147483649");
echo gmp_strval($pow1) . "\n";
?>

The printout of the above program will be:

2147483648

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