Check for PDF/A information
This demo extracts the PDF document metadata and checks for PDF/A information.
PHP
<?php // load and register the autoload function require_once '../../../../../bootstrap.php'; $files = [ $assetsDirectory . '/pdfs/tektown/invoices/1012.pdf', $assetsDirectory . '/pdfs/tektown/invoices/1012-pdfa-3b.pdf', $assetsDirectory . '/pdfs/tektown/invoices/1157.pdf', $assetsDirectory . '/pdfs/tektown/invoices/1157-pdfa-3u.pdf', ]; $path = displayFiles($files); $document = \SetaPDF_Core_Document::loadByFilename($path); $metadata = $document->getInfo()->getMetadata(); $xpath = new \DOMXPath($metadata); $xpath->registerNamespace('x', 'adobe:ns:meta/'); $xpath->registerNamespace('rdf', 'http://www.w3.org/1999/02/22-rdf-syntax-ns#'); $xpath->registerNamespace('pdfaid', 'http://www.aiim.org/pdfa/ns/id/'); $part = $xpath->query('//x:xmpmeta/rdf:RDF/rdf:Description/pdfaid:part')->item(0); $conformance = $xpath->query('//x:xmpmeta/rdf:RDF/rdf:Description/pdfaid:conformance')->item(0); if ($part === null || $conformance === null) { echo 'No PDF/A information found.'; die(); } echo sprintf('This file claims compliance with the PDF/A-%s%s standard.', $part->nodeValue, $conformance->nodeValue);