function _emfield_retrieve_xml in Embedded Media Field 6.3

Same name and namespace in other branches

1. 6.2 includes/emfield.xml.inc \_emfield_retrieve_xml()

A wrapper around simplexml to retrieve a given XML file.

Parameters

$url: The URL to the XML to retrieve. @param $display_errors Optional; if TRUE, then we'll display errors to the end user. They'll be logged to the watchdog in any case. @param $refresh Optional; if TRUE, then we'll force a new load of the XML. Otherwise, a cached version will be retrieved if possible. @return A fully populated object, or FALSE on an error.

File

includes/emfield.xml.inc, line 22

XML data retrieval and storage API for Embedded Media Field.

Code

function _emfield_retrieve_xml($url, $display_errors = FALSE, $refresh = FALSE) {
  static $xmls;
  if (!isset($xmls)) {
    $xmls = array();
  }

  // Return our cached XML if allowed, and it exists.
  if (!$refresh && isset($xmls[$url])) {
    return $xmls[$url];
  }
  else {
    if (!$refresh && ($cache = cache_get('emfield:xml:' . $url, 'cache_emfield_xml'))) {
      $xmls[$url] = $cache->data;
      return $xmls[$url];
    }
  }

  // Enable user error handling.
  libxml_use_internal_errors(TRUE);

  // Load the document
  $xml = simplexml_load_file($url);
  if (!$xml) {
    foreach (libxml_get_errors() as $error) {
      $message = 'Error retrieving XML from %url: %error';
      $params = array(
        '%url' => $url,
        '%error' => $error->message,
      );

      // Handle errors here.
      if ($display_errors) {
        drupal_set_message(t($message, $params), 'error');
      }
      watchdog('emfield', $message, $params, WATCHDOG_WARNING);
    }

    // Clear our error cache.
    libxml_clear_errors();

    // Set the static cache, but not Drupal's cache, so we can attempt to
    // retrieve the file another time if possible.
    $xmls[$url] = FALSE;
  }
  else {
    $xmls[$url] = _emfield_unserialize_xml($xml);
    cache_set('emfield:xml:' . $url, $xmls[$url], 'cache_emfield_xml', variable_get('emfield_xml_cache_expire', 3600));
  }
  return $xmls[$url];
}