Snippet to read DirectoryRecordSequenceItems from a DICOMDIR file using Nanodicom

read-directory-records.php

<?php 
require 'nanodicom.php';
// File to read
$filename = 'DICOMDIR';

$dicom = Nanodicom::factory($filename);
// Parse whole file
$dicom->parse();

// Get the sequence
$DirectoryRecordSequence   = $dicom->value(0x0004, 0x1220);
// Get the sequence items
$DirectoryRecordSequenceItems = $dicom->read_sequence_items($DirectoryRecordSequence);

// You can iterate through now
foreach ($DirectoryRecordSequenceItems as $item)
{
	// Returned value when it does not exist is FALSE.
	$ReferencedFileID   = ($dicom->dataset_value($item, 0x0004, 0x1500) === FALSE) ? 'N/A' : $dicom->dataset_value($item, 0x0004, 0x1500);
	echo $ReferencedFileID."\n";
}