dchesterton/image

Image metadata library

Image metadata library (PHP 5.5+)

, _(*1)

, _(*2)

Warning: This library is pre-alpha and much of it is a WIP or simply not working at all. Proceed at your own risk.

Supported image types: - JPEG - PNG - ~~GIF~~ - ~~PDF~~ - ~~SVG~~ - ~~WEBP~~ - ~~TIFF~~ - ~~DNG~~ - ~~RAW FORMATS~~ - ~~CR2, NEF, etc.~~, _(*3)

Supported image meta types: - XMP - IPTC - ~~EXIF~~, _(*4)

Get metadata

$image = Image::fromFile($filename);

$headline = $image->getXmp()->getHeadline();
$camera = $image->getExif()->getCamera();
...

Modify existing metadata

$image = Image::fromFile($filename);

$xmp = $image->getXmp();
$xmp->setHeadline('A test headline');
$xmp->setCaption('Caption');

$image->getIptc()->setCategory('Category');

$image->save();

Standalone XMP

Generating standalone XMP

$xmp = new Xmp;
$xmp->setHeadline('A headline')
...

$data = $xmp->getXml();

Modifying standalone XMP

$xmp = new Xmp($data); // or Xmp::fromFile($filename)
$xmp->setHeadline('A headline');

$data = $xmp->getXml();

Setting/replacing XMP in image

$xmp = new Xmp;
$xmp->setHeadline('A headline');
...

$image = Image::fromFile($filename);
$image->setXmp($xmp);

$image->save() // or $image->getBytes()

Loading specific image type

When file type is known, you can load the file type directly using the file types' fromFile method., _(*5)

$jpeg = JPEG::fromFile('image.jpg');
$png = PNG::fromFile('image.png');

Instantiate from bytes

If you don't have a file to work with but you do have the image stored in a string (from database, ImageMagick etc.) you can easily instantiate an object from the string., _(*6)

$data = ...

$jpeg = JPEG::fromString($data);
$jpeg->getXmp()->setHeadline('Test headline');

$jpeg->save('out.jpg'); // or $jpeg->getBytes();

Instantiate from GD or a stream

You can also create an object from a GD resource or a stream., _(*7)

$gd = imagecreate(100, 100);
$jpeg = JPEG::fromResource($gd);

$stream = fopen('...', 'r+');
$jpeg = JPEG::fromStream($stream);

Aggregate metadata

When just want a piece of metadata and don't care whether it's from XMP, IPTC or EXIF, you can use the aggregate meta object., _(*8)

$image = Image::fromFile($filename);
$headline = $image->getAggregate()->getHeadline();

By default it checks XMP first, then IPTC, then EXIF but you can change the priority:, _(*9)

$aggregate = $image->getAggregate();
$aggregate->setPriority(['exif', 'iptc', 'xmp']);

$aggregate->getHeadline(); // will now check EXIF first, then IPTC, then XMP

You can also exclude a metadata type if you do not want to use it:, _(*10)

$aggregate->setPriority(['iptc', 'xmp']);
$aggregate->getHeadline(); // will only check IPTC and XMP

You can also modify metadata on an aggregate level:, _(*11)

$image = Image::fromFile($filename);
$image->getAggregate()->setHeadline('Headline');

$image->save();

This would set the headline in both XMP and IPTC. For maximum compatibility with other software it's recommended to use the aggregate metadata object where available., _(*12)

Get GPS data

$image = ...
$gps = $image->getAggregateMeta()->getGPS(); // checks EXIF and XMP
// or $gps = $image->getExif()->getGPS();

$lat = $gps->getLatitude();