PHP - XML - Get Node Count of a Glob of XML Docs

getXMLNodeCount.php

<?php

$xml_files = glob("./POC_LO_SET/*.xml");

print "starting" . "\n";

$overall_count = array();
//$amount_to_try = 2;

foreach ($xml_files as $file) {
  $doc = new DOMDocument();
  $doc->loadXML(file_get_contents($file));
  $xpath = new DOMXpath($doc);
  $nodes = $xpath->query('//*');
  $names = array();
  foreach ($nodes as $node) {
      $names[] = $node->nodeName;
  }
  $file_counts = array_count_values($names);


  // Merge new array with overall array
  foreach (array_keys($file_counts + $overall_count) as $key) {
      $overall_count[$key] = (isset($file_counts[$key]) ? $file_counts[$key] : 0) + (isset($overall_count[$key]) ? $overall_count[$key] : 0);
  }

  // if we're testing on a subset, let's print the count of each
  if (isset($amount_to_try) {
      print_r($file_counts);
  }
  // break out of loop if number to try is set and gets to 0
  if (isset($amount_to_try) && !--$amount_to_try) break;
}

print_r($overall_count);