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<?xml version="1.0" encoding="iso-8859-1"?>
<!-- $Revision: 1.7 $ -->
<!-- splitted from ./en/functions/url.xml, last change in rev 1.2 -->
<refentry id="function.base64-encode">
<refnamediv>
<refname>base64_encode</refname>
<refpurpose>Encodes data with MIME base64</refpurpose>
</refnamediv>
<refsect1>
<title>Description</title>
<methodsynopsis>
<type>string</type><methodname>base64_encode</methodname>
<methodparam><type>string</type><parameter>data</parameter></methodparam>
</methodsynopsis>
<para>
<function>base64_encode</function> returns
<parameter>data</parameter> encoded with base64. This encoding
is designed to make binary data survive transport through
transport layers that are not 8-bit clean, such as mail bodies.
</para>
<para>
Base64-encoded data takes about 33% more space than the original
data.
</para>
<para>
<example>
<title><function>base64_encode</function> example</title>
<programlisting role="php">
<![CDATA[
<?php
$str = 'This is an encoded string';
echo base64_encode($str);
?>
]]>
</programlisting>
<para>
This example will produce:
</para>
<screen>
<![CDATA[
VGhpcyBpcyBhbiBlbmNvZGVkIHN0cmluZw==
]]>
</screen>
</example>
</para>
<para>
See also
<function>base64_decode</function>,
<function>chunk_split</function>,
<function>convert_uuencode</function> and
<ulink url="&url.rfc;2045">RFC 2045</ulink> section 6.8.
</para>
</refsect1>
</refentry>
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