php-doc-en/reference/url/functions/base64-encode.xml
2011-10-08 20:53:40 +00:00

107 lines
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XML

<?xml version="1.0" encoding="utf-8"?>
<!-- $Revision$ -->
<refentry xml:id="function.base64-encode" xmlns="http://docbook.org/ns/docbook" xmlns:xlink="http://www.w3.org/1999/xlink">
<refnamediv>
<refname>base64_encode</refname>
<refpurpose>Encodes data with MIME base64</refpurpose>
</refnamediv>
<refsect1 role="description">
&reftitle.description;
<methodsynopsis>
<type>string</type><methodname>base64_encode</methodname>
<methodparam><type>string</type><parameter>data</parameter></methodparam>
</methodsynopsis>
<para>
Encodes the given <parameter>data</parameter> with base64.
</para>
<para>
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>
</refsect1>
<refsect1 role="parameters">
&reftitle.parameters;
<para>
<variablelist>
<varlistentry>
<term><parameter>data</parameter></term>
<listitem>
<para>
The data to encode.
</para>
</listitem>
</varlistentry>
</variablelist>
</para>
</refsect1>
<refsect1 role="returnvalues">
&reftitle.returnvalues;
<para>
The encoded data, as a string&return.falseforfailure;.
</para>
</refsect1>
<refsect1 role="examples">
&reftitle.examples;
<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>
&example.outputs;
<screen>
<![CDATA[
VGhpcyBpcyBhbiBlbmNvZGVkIHN0cmluZw==
]]>
</screen>
</example>
</para>
</refsect1>
<refsect1 role="seealso">
&reftitle.seealso;
<para>
<simplelist>
<member><function>base64_decode</function></member>
<member><function>chunk_split</function></member>
<member><function>convert_uuencode</function></member>
<member><link xlink:href="&url.rfc;2045">RFC 2045</link> section 6.8</member>
</simplelist>
</para>
</refsect1>
</refentry>
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