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<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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