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<?xml version="1.0" encoding="iso-8859-1"?>
<!-- $Revision: 1.9 $ -->
<refentry xml:id='function.iptcembed' xmlns="http://docbook.org/ns/docbook">
<refnamediv>
<refname>iptcembed</refname>
<refpurpose>Embed binary IPTC data into a JPEG image</refpurpose>
</refnamediv>
<refsect1 role="description">
&reftitle.description;
<methodsynopsis>
<type>mixed</type><methodname>iptcembed</methodname>
<methodparam><type>string</type><parameter>iptcdata</parameter></methodparam>
<methodparam><type>string</type><parameter>jpeg_file_name</parameter></methodparam>
<methodparam choice="opt"><type>int</type><parameter>spool</parameter></methodparam>
</methodsynopsis>
</refsect1>
<refsect1 role="parameters">
&reftitle.parameters;
<para>
<variablelist>
<varlistentry>
<term><parameter>iptcdata</parameter></term>
<listitem>
<para>
The data to be written.
</para>
</listitem>
</varlistentry>
<varlistentry>
<term><parameter>jpeg_file_name</parameter></term>
<listitem>
<para>
Path to the JPEG image.
</para>
</listitem>
</varlistentry>
<varlistentry>
<term><parameter>spool</parameter></term>
<listitem>
<para>
Spool flag. If the spool flag is over 2 then the JPEG will be
returned as a string.
</para>
</listitem>
</varlistentry>
</variablelist>
</para>
</refsect1>
<refsect1 role="returnvalues">
&reftitle.returnvalues;
<para>
If success and spool flag is lower than 2 then the JPEG will not be
returned as a string, &false; on errors.
</para>
</refsect1>
<refsect1 role="examples">
&reftitle.examples;
<example>
<title>Embedding IPTC data into a JPEG</title>
<programlisting role="php">
<![CDATA[
<?php
// iptc_make_tag() function by Thies C. Arntzen
function iptc_make_tag($rec, $data, $value)
{
$length = strlen($value);
$retval = chr(0x1C) . chr($rec) . chr($data);
if($length < 0x8000)
{
$retval .= chr($length >> 8) . chr($length & 0xFF);
}
else
{
$retval .= chr(0x80) .
chr(0x04) .
chr(($length >> 24) & 0xFF) .
chr(($length >> 16) & 0xFF) .
chr(($length >> 8) & 0xFF) .
chr($length & 0xFF);
}
return $retval . $value;
}
// Path to jpeg file
$path = './phplogo.jpg';
// We need to check if theres any IPTC data in the jpeg image. If there is then
// bail out because we cannot embed any image that already has some IPTC data!
$image = getimagesize($path, $info);
if(isset($info['APP13']))
{
die('Error: IPTC data found in source image, cannot continue');
}
// Set the IPTC tags
$iptc = array(
'2#120' => 'Test image',
'2#116' => 'Copyright 2008, The PHP Group'
);
// Convert the IPTC tags into binary code
$data = '';
foreach($iptc as $tag => $string)
{
$tag = substr($tag, 2);
$data .= iptc_make_tag(2, substr($tag, 2), $string);
}
// Embed the IPTC data
$content = iptcembed($data, $path);
?>
]]>
</programlisting>
</example>
</refsect1>
<refsect1 role="notes">
&reftitle.notes;
<note>
<para>
This function does not require the GD image library.
</para>
</note>
</refsect1>
</refentry>
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