Voici une class qui permet de gérer les données IPTC d'une image.
On peut définir la liste des tags à utiliser, les récupérer via l'image, en ajouter / modifier.
Plusieurs exemples sont en fin de source.
Source / Exemple :
<?php
/**
- Manipulate IPTC tags
-
- @date 08-20-2010
- @author ShevAbam
- /
class IptcManager
{
public $file = '';
public $listTags = array();
/**
public function __construct()
{
$this->listTags();
}
/**
- Sets the image file
-
- @param string $filename Path of the image file
- @return object
- /
public function setFile($filename)
{
if (!empty($filename) && is_file($filename))
$this->file = $filename;
return $this;
}
/**
- Sets the IPTC tags
-
- @return void
- /
public function listTags()
{
// Most common tags. You can redefine this method by extending the class
$getAll = array(
array('id' => 1, 'name' => 'Object type', 'tag' => '2#003'),
array('id' => 2, 'name' => 'Object attribute', 'tag' => '2#004'),
array('id' => 3, 'name' => 'Title', 'tag' => '2#005'),
array('id' => 4, 'name' => 'Edit status', 'tag' => '2#007'),
array('id' => 5, 'name' => 'Editorial update', 'tag' => '2#008'),
array('id' => 6, 'name' => 'Urgency', 'tag' => '2#010'),
array('id' => 7, 'name' => 'Subject reference', 'tag' => '2#012'),
array('id' => 8, 'name' => 'Category', 'tag' => '2#015'),
array('id' => 9, 'name' => 'Supplemental categories', 'tag' => '2#020'),
array('id' => 10, 'name' => 'Fixture identifier', 'tag' => '2#022'),
array('id' => 11, 'name' => 'Keywords', 'tag' => '2#025'),
array('id' => 12, 'name' => 'Location code', 'tag' => '2#026'),
array('id' => 13, 'name' => 'Location name', 'tag' => '2#027'),
array('id' => 14, 'name' => 'Release date', 'tag' => '2#030'),
array('id' => 15, 'name' => 'Release time', 'tag' => '2#035'),
array('id' => 16, 'name' => 'Expiration date', 'tag' => '2#037'),
array('id' => 17, 'name' => 'Expiration time', 'tag' => '2#038'),
array('id' => 18, 'name' => 'Instructions', 'tag' => '2#040'),
array('id' => 19, 'name' => 'Action advised', 'tag' => '2#042'),
array('id' => 20, 'name' => 'Reference service', 'tag' => '2#045'),
array('id' => 21, 'name' => 'Reference date', 'tag' => '2#047'),
array('id' => 22, 'name' => 'Reference number', 'tag' => '2#050'),
array('id' => 23, 'name' => 'Date created', 'tag' => '2#055'),
array('id' => 24, 'name' => 'Time created', 'tag' => '2#060'),
array('id' => 25, 'name' => 'Digital creation date', 'tag' => '2#062'),
array('id' => 26, 'name' => 'Digital creation time', 'tag' => '2#063'),
array('id' => 27, 'name' => 'Originating program', 'tag' => '2#065'),
array('id' => 28, 'name' => 'Program version', 'tag' => '2#070'),
array('id' => 29, 'name' => 'Object cycle', 'tag' => '2#075'),
array('id' => 30, 'name' => 'Author', 'tag' => '2#080'),
array('id' => 31, 'name' => 'AuthorsPosition', 'tag' => '2#085'),
array('id' => 32, 'name' => 'City', 'tag' => '2#090'),
array('id' => 33, 'name' => 'Sublocation', 'tag' => '2#092'),
array('id' => 34, 'name' => 'State/Province', 'tag' => '2#095'),
array('id' => 35, 'name' => 'Country code', 'tag' => '2#100'),
array('id' => 36, 'name' => 'Country', 'tag' => '2#101'),
array('id' => 37, 'name' => 'Transmission reference', 'tag' => '2#103'),
array('id' => 38, 'name' => 'Headline', 'tag' => '2#105'),
array('id' => 39, 'name' => 'Credit', 'tag' => '2#110'),
array('id' => 40, 'name' => 'Source', 'tag' => '2#115'),
array('id' => 41, 'name' => 'Copyright notice', 'tag' => '2#116'),
array('id' => 42, 'name' => 'Contact Information', 'tag' => '2#118'),
array('id' => 43, 'name' => 'Description', 'tag' => '2#120'),
array('id' => 44, 'name' => 'Description writer', 'tag' => '2#122'),
array('id' => 45, 'name' => 'Image type', 'tag' => '2#130'),
array('id' => 46, 'name' => 'Image orientation', 'tag' => '2#131'),
array('id' => 47, 'name' => 'Language identifier', 'tag' => '2#135'),
array('id' => 48, 'name' => 'AudioType', 'tag' => '2#150'),
array('id' => 49, 'name' => 'AUdio sampling rate', 'tag' => '2#151'),
array('id' => 50, 'name' => 'Audio sampling resolution', 'tag' => '2#152'),
array('id' => 51, 'name' => 'Audio duration', 'tag' => '2#153'),
array('id' => 52, 'name' => 'Audio outcue', 'tag' => '2#154'),
array('id' => 53, 'name' => 'Job ID', 'tag' => '2#184'),
array('id' => 54, 'name' => 'Master document ID', 'tag' => '2#185'),
array('id' => 55, 'name' => 'Short document ID', 'tag' => '2#186'),
array('id' => 56, 'name' => 'Unique document ID', 'tag' => '2#187'),
array('id' => 57, 'name' => 'Owner ID', 'tag' => '2#188'),
array('id' => 58, 'name' => 'Object preview file format', 'tag' => '2#200'),
array('id' => 59, 'name' => 'Object preview file version', 'tag' => '2#201'),
array('id' => 60, 'name' => 'Object preview data', 'tag' => '2#202'),
array('id' => 61, 'name' => 'Prefs', 'tag' => '2#221'),
array('id' => 62, 'name' => 'Classify state', 'tag' => '2#225'),
array('id' => 63, 'name' => 'Similarity index', 'tag' => '2#228'),
array('id' => 64, 'name' => 'Document notes', 'tag' => '2#230'),
array('id' => 65, 'name' => 'Document history', 'tag' => '2#231'),
array('id' => 66, 'name' => 'Exif camera info', 'tag' => '2#232'),
array('id' => 67, 'name' => 'Catalog sets', 'tag' => '2#255')
);
if (count($getAll) > 0)
{
foreach ($getAll as $tag)
$this->listTags[$tag['id']] = $tag['tag'];
}
}
/**
- Returns the content of an IPTC tag. If $tag is not specified, returns all tags.
-
- @param string $tag Name of the IPTC tag presents in $this->listTags
- @return string
- /
public function get($tag = null)
{
// If you specify a particular tag, it returns information for this tag
if (!is_null($tag) && !empty($tag) && in_array($tag, $this->listTags))
{
$size = getimagesize($this->file, $info);
if (isset($info['APP13'][$tag]))
{
$iptc = iptcparse($info['APP13']);
return $iptc[$tag][0];
}
}
else
{
// Otherwise, it returns the complete info
$size = getimagesize($this->file, $info);
if (isset($info['APP13']))
{
return iptcparse($info['APP13']);
}
}
}
/**
- Add an IPTC tag
-
- @param string $tag Name of the IPTC tag presents in $this->listTags
- @param string $value IPTC tag value
- @param bool $save If save the image with the settings or not
- @return mixed
- /
public function add($tag, $value, $save = true)
{
// If tag is valid
if (empty($tag) || empty($value) || !in_array($tag, $this->listTags))
return false;
$tag = substr($tag, 2);
$datas = $this->_transform_iptc($tag, $value);
if ($save == true)
$this->save($datas);
else
return $datas;
}
/**
- Add severals IPTC tags
-
- @param array $array List of IPTC tags and values
- @param bool $save If save the image with the settings or not
- @return mixed
- /
public function addMultiple($array, $save = true)
{
// If tag is valid
if (!is_array($array) || count($array) == 0)
return false;
$iptcdata = null;
foreach ($array as $tag => $string)
{
if (in_array($tag, $this->listTags))
{
$tag = substr($tag, 2);
$iptcdata .= $this->_transform_iptc($tag, $string);
}
}
if ($save == true)
$this->save($iptcdata);
else
return $iptcdata;
}
/**
- Save IPTC into image
-
- @param string $datas IPTC datas
- @param string $newImageName New image name
- @return void
- /
public function save($datas, $newImageName = '')
{
if (!empty($newImageName))
$imageName = $newImageName;
else
$imageName = $this->file;
// Writing datas in the image
$data_image = iptcembed($datas, $this->file);
$fp = fopen($imageName, "wb");
fwrite($fp, $data_image);
fclose($fp);
}
/**
- Format the new IPTC text
-
- @param string $data IPTC datas
- @param string $value IPTC tag value
- @return string
- /
private function _transform_iptc($data, $value)
{
$length = strlen($value);
$retval = chr(0x1C).chr(2).chr($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;
}
}
// -- Examples
$oIptc = new IptcManager();
// Returns all IPTC tags
$oIptc->setFile('image_test.jpg')->get();
// Returns Title tag
$oIptc->setFile('image_test.jpg')->get('2#005');
// Add a tag
$oIptc->setFile('image_test.jpg')->add('2#025', 'My keywords');
$oIptc->get();
// Add severals IPTC tags
$array = array(
'2#080' => 'ShevAbam',
'2#101' => 'France'
);
$oIptc->setFile('image_test.jpg')->AddMultiple($array);
$oIptc->get();
?>
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