composer require wikimedia/xmp-reader

use Wikimedia\XMPReader\Reader as XMPReader;

//...

// Check if the php instance has the required supported libraries to parse XMP
$isXMPSupported = XMPReader::isSupported();

// Create a new instance
$xmp = new XMPReader();
// or
$xmp = new XMPReader( $logger, $filename );
// where $logger is an implementation of Psr\Log\LoggerInterface and $filename a string describing the origin of your XMP content

// To parse XMP data in $string
$xmp->parse( $string );

// To parse XMP Extended data in $string
$xmp->parseExtended( $string );

// To retrieve the parsed results
$results = $xmp->getResults();

[
	'xmp-exif' => [],
	'xmp-general' => [],
	'xmp-deprecated' => [],
]