81 lines
2.2 KiB
PHP
81 lines
2.2 KiB
PHP
<?php
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/**
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* @file
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* XML data retrieval and storage API for Media.
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*/
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/**
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* A wrapper around simplexml to retrieve a given XML file.
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*
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* @param $url
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* The URL to the XML to retrieve.
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* @param $display_errors
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* Optional; if TRUE, then we'll display errors to the end user. They'll be
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* logged to the watchdog in any case.
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* @param $refresh
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* Optional; if TRUE, then we'll force a new load of the XML. Otherwise,
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* a cached version will be retrieved if possible.
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* @return
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* A fully populated object, or FALSE on an error.
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*/
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function _media_retrieve_xml($url, $display_errors = FALSE, $refresh = FALSE) {
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$xmls = &drupal_static(__FUNCTION__, array());
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// Return our cached XML if allowed, and it exists.
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if (!$refresh && isset($xmls[$url])) {
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return $xmls[$url];
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}
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elseif (!$refresh && $cache = cache_get('media:xml:' . $url, 'cache_media_xml')) {
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$xmls[$url] = $cache->data;
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return $xmls[$url];
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}
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// Enable user error handling.
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libxml_use_internal_errors(TRUE);
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// Load the document
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$xml = simplexml_load_file($url);
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if (!$xml) {
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foreach (libxml_get_errors() as $error) {
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$params = array('%url' => $url, '%error' => $error->message);
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// Handle errors here.
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if ($display_errors) {
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drupal_set_message(t('Error retrieving XML from %url: %error', $params), 'error');
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}
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watchdog('media', 'Error retrieving XML from %url: %error', $params, WATCHDOG_WARNING);
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}
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// Clear our error cache.
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libxml_clear_errors();
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// Set the static cache, but not Drupal's cache, so we can attempt to
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// retrieve the file another time if possible.
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$xmls[$url] = FALSE;
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}
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else {
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$xmls[$url] = _media_unserialize_xml($xml);
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cache_set('media:xml:' . $url, $xmls[$url], 'cache_media_xml', media_variable_get('xml_cache_expire', 3600));
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}
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return $xmls[$url];
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}
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/**
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* Recursively converts a SimpleXMLElement object into an array.
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* @param $xml
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* The original XML object.
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*/
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function _media_unserialize_xml($xml) {
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if ($xml instanceof SimpleXMLElement) {
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$xml = (array) $xml;
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}
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if (is_array($xml)) {
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foreach ($xml as $key => $item) {
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$xml[$key] = _media_unserialize_xml($item);
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}
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}
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return $xml;
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}
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