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<?xml version="1.0" encoding="utf-8"?>
<!-- $Revision: 297028 $ -->
<refentry xmlns="http://docbook.org/ns/docbook" xml:id="function.gmp-random">
<refnamediv>
<refname>gmp_random</refname>
<refpurpose>Random number</refpurpose>
</refnamediv>
<refsect1 role="description">
&reftitle.description;
<methodsynopsis>
<type>resource</type><methodname>gmp_random</methodname>
<methodparam choice="opt"><type>int</type><parameter>limiter</parameter><initializer>20</initializer></methodparam>
</methodsynopsis>
<para>
Generate a random number. The number will be between
zero and the number of bits per limb multiplied by
<parameter>limiter</parameter>. If <parameter>limiter</parameter>
is negative, negative numbers are generated.
</para>
<para>
A limb is an internal GMP mechanism. The number of bits in a limb is
not static, and can vary from system to system. Generally, the number
of bits in a limb is either 16 or 32, but this is not guaranteed.
</para>
</refsect1>
<refsect1 role="parameters">
&reftitle.parameters;
<para>
<variablelist>
<varlistentry>
<term><parameter>limiter</parameter></term>
<listitem>
<para>
The limiter.
</para>
&gmp.parameter;
</listitem>
</varlistentry>
</variablelist>
</para>
</refsect1>
<refsect1 role="returnvalues">
&reftitle.returnvalues;
<para>
A random GMP number.
</para>
</refsect1>
<refsect1 role="examples">
&reftitle.examples;
<para>
<example>
<title><function>gmp_random</function> example</title>
<programlisting role="php">
<![CDATA[
<?php
$rand1 = gmp_random(1); // random number from 0 to 1 * bits per limb
$rand2 = gmp_random(2); // random number from 0 to 2 * bits per limb
echo gmp_strval($rand1) . "\n";
echo gmp_strval($rand2) . "\n";
?>
]]>
</programlisting>
&example.outputs;
<screen>
<![CDATA[
1915834968
8642564075890328087
]]>
</screen>
</example>
</para>
</refsect1>
</refentry>
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