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<?xml version="1.0" encoding="utf-8"?>
<!-- $Revision: 322055 $ -->
<refentry xml:id="function.idn-to-ascii" xmlns="http://docbook.org/ns/docbook" xmlns:xlink="http://www.w3.org/1999/xlink">
<refnamediv>
<refname>idn_to_ascii</refname>
<refpurpose>Convert domain name to IDNA ASCII form.</refpurpose>
</refnamediv>
<refsect1 role="description">
&reftitle.description;
<para>&style.procedural;</para>
<methodsynopsis>
<type>string</type><methodname>idn_to_ascii</methodname>
<methodparam><type>string</type><parameter>domain</parameter></methodparam>
<methodparam choice="opt"><type>int</type><parameter>options</parameter><initializer>0</initializer></methodparam>
<methodparam choice="opt"><type>int</type><parameter>variant</parameter><initializer>INTL_IDNA_VARIANT_2003</initializer></methodparam>
<methodparam choice="opt"><type>array</type><parameter role="reference">idna_info</parameter></methodparam>
</methodsynopsis>
<para>
This function converts Unicode domain name to IDNA ASCII-compatible format.
</para>
</refsect1>
<refsect1 role="parameters">
&reftitle.parameters;
<para>
<variablelist>
<varlistentry>
<term><parameter>domain</parameter></term>
<listitem>
<para>
Domain to convert. In PHP 5 must be UTF-8 encoded.
</para>
</listitem>
</varlistentry>
<varlistentry>
<term><parameter>options</parameter></term>
<listitem>
<para>
Conversion options - combination of IDNA_* constants
(except IDNA_ERROR_* constants).
</para>
</listitem>
</varlistentry>
<varlistentry>
<term><parameter>variant</parameter></term>
<listitem>
<para>
Either <constant>INTL_IDNA_VARIANT_2003</constant> for IDNA 2003 or
<constant>INTL_IDNA_VARIANT_UTS46</constant> for UTS #46.
</para>
</listitem>
</varlistentry>
<varlistentry>
<term><parameter>idna_info</parameter></term>
<listitem>
<para>
This parameter can be used only if
<constant>INTL_IDNA_VARIANT_UTS46</constant> was used for
<parameter>variant</parameter>. In that case, it will be filled with an
array with the keys <literal>'result'</literal>, the possibly illegal
result of the transformation,
<literal>'isTransitionalDifferent'</literal>, a boolean indicating
whether the usage of the transitional mechanisms of UTS #46 either has
or would have changed the result and <literal>'errors'</literal>,
which is an <type>int</type> representing a bitset of the error
constants IDNA_ERROR_*.
</para>
</listitem>
</varlistentry>
</variablelist>
</para>
</refsect1>
<refsect1 role="returnvalues">
&reftitle.returnvalues;
<para>
Domain name encoded in ASCII-compatible form. &return.falseforfailure;
</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>5.4.0/PECL 2.0.0b1</entry>
<entry>
Added the parameters <parameter>variant</parameter> and
<parameter>idna_info</parameter>; UTS #46 support.
</entry>
</row>
</tbody>
</tgroup>
</informaltable>
</para>
</refsect1>
<refsect1 role="examples">
&reftitle.examples;
<example>
<title><function>idn_to_ascii</function> example</title>
<programlisting role="php">
<![CDATA[
<?php
echo idn_to_ascii('täst.de');
?>
]]>
</programlisting>
</example>
&example.outputs;
<screen>
<![CDATA[
xn--tst-qla.de
]]>
</screen>
</refsect1>
<refsect1 role="seealso">
&reftitle.seealso;
<para>
<simplelist>
<member><function>idn_to_unicode</function></member>
</simplelist>
</para>
</refsect1>
</refentry>
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