php-doc-en/reference/gmp/functions/gmp-powm.xml
2004-02-26 11:14:11 +00:00

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XML

<?xml version="1.0" encoding="iso-8859-1"?>
<!-- $Revision: 1.4 $ -->
<!-- splitted from ./en/functions/gmp.xml, last change in rev 1.1 -->
<refentry id="function.gmp-powm">
<refnamediv>
<refname>gmp_powm</refname>
<refpurpose>Raise number into power with modulo</refpurpose>
</refnamediv>
<refsect1>
<title>Description</title>
<methodsynopsis>
<type>resource</type><methodname>gmp_powm</methodname>
<methodparam><type>resource</type><parameter>base</parameter></methodparam>
<methodparam><type>resource</type><parameter>exp</parameter></methodparam>
<methodparam><type>resource</type><parameter>mod</parameter></methodparam>
</methodsynopsis>
<para>
Calculate (<parameter>base</parameter> raised into power
<parameter>exp</parameter>) modulo <parameter>mod</parameter>. If
<parameter>exp</parameter> is negative, result is undefined.
</para>
<example>
<title><function>gmp_powm</function> example</title>
<programlisting role="php">
<![CDATA[
<?php
$pow1 = gmp_powm("2", "31", "2147483649");
echo gmp_strval($pow1) . "\n";
?>
]]>
</programlisting>
<para>
The printout of the above program will be:
</para>
<screen>
<![CDATA[
2147483648
]]>
</screen>
</example>
</refsect1>
</refentry>
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