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<?xml version="1.0" encoding="utf-8"?>
<!-- $Revision: 297028 $ -->
<refentry xmlns="http://docbook.org/ns/docbook" xml:id="function.gmp-init">
<refnamediv>
<refname>gmp_init</refname>
<refpurpose>Create GMP number</refpurpose>
</refnamediv>
<refsect1 role="description">
&reftitle.description;
<methodsynopsis>
<type>resource</type><methodname>gmp_init</methodname>
<methodparam><type>mixed</type><parameter>number</parameter></methodparam>
<methodparam choice="opt"><type>int</type><parameter>base</parameter><initializer>0</initializer></methodparam>
</methodsynopsis>
<para>
Creates a GMP number from an integer or string.
</para>
</refsect1>
<refsect1 role="parameters">
&reftitle.parameters;
<para>
<variablelist>
<varlistentry>
<term><parameter>number</parameter></term>
<listitem>
<para>
An integer or a string. The string representation can be decimal,
hexadecimal or octal.
</para>
</listitem>
</varlistentry>
<varlistentry>
<term><parameter>base</parameter></term>
<listitem>
<para>
The base.
</para>
<para>
The base may vary from 2 to 36. If base is 0 (default value), the
actual base is determined from the leading characters: if the first
two characters are <literal>0x</literal> or <literal>0X</literal>,
hexadecimal is assumed, otherwise if the first character is "0",
octal is assumed, otherwise decimal is assumed.
</para>
</listitem>
</varlistentry>
</variablelist>
</para>
</refsect1>
<refsect1 role="returnvalues">
&reftitle.returnvalues;
<para>
&gmp.return;
</para>
</refsect1>
<refsect1 role="changelog">
&reftitle.changelog;
<para>
<informaltable>
<tgroup cols="2">
<thead>
<row>
<entry>&Version;</entry>
<entry>&Description;</entry>
</row>
</thead>
<tbody>
<row>
<entry>5.3.2</entry>
<entry>
The <parameter>base</parameter> was extended from 2 to 36, to
2 to 62 and -2 to -36.
</entry>
</row>
<row>
<entry>4.1.0</entry>
<entry>
The optional <parameter>base</parameter> parameter was added.
</entry>
</row>
</tbody>
</tgroup>
</informaltable>
</para>
</refsect1>
<refsect1 role="notes">
&reftitle.notes;
<note>
<para>
To use the extended base introduced in PHP 5.3.2, then
PHP must be compiled against GMP 4.2.0 or greater.
</para>
</note>
</refsect1>
<refsect1 role="examples">
&reftitle.examples;
<para>
<example>
<title>Creating GMP number</title>
<programlisting role="php">
<![CDATA[
<?php
$a = gmp_init(123456);
$b = gmp_init("0xFFFFDEBACDFEDF7200");
?>
]]>
</programlisting>
</example>
</para>
</refsect1>
<refsect1 role="notes">
&reftitle.notes;
<note>
<para>
It is not necessary to call this function if you want to use
integer or string in place of GMP number in GMP functions, like
<function>gmp_add</function>. Function arguments are
automatically converted to GMP numbers, if such conversion is
possible and needed, using the same rules as
<function>gmp_init</function>.
</para>
</note>
</refsect1>
</refentry>
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