''"; $result = mysql_query($sql) or die("Couldn't execute query. " . $sql . mysql_error()); while ($row = mysql_fetch_object($result)) { $all_links[$row->link_url] = array($row->link_id,0); } } /** ** update_links() ** Update in the db the links which have been updated ($all_links[url][1] != 0) **/ function update_links() { global $tablelinks, $all_links; dbconnect(); reset($all_links); while (list($id, $val) = each($all_links)) { if ($val[1]) { $sql = "UPDATE $tablelinks SET link_updated = '$val[1]' WHERE link_id = $val[0] "; //echo("executing: $sql\n"); if (mysql_query($sql) == false) { //ignore update errors! no data loss //echo("Couldn't execute query. " . $sql . mysql_error()); } } } // end while } /** ** get_weblogs_updatedfile() ** Retrieves and caches a copy of the weblogs.com changed blogs xml file. ** If the file exists check it's age, get new copy if old. ** If a new or updated file has been written return true (needs processing) ** otherwise return false (nothing to do) **/ function get_weblogs_updatedfile() { global $weblogs_cache_file, $weblogs_xml_url, $weblogs_cacheminutes; $update = false; if (file_exists($weblogs_cache_file)) { // is it old? $modtime = filemtime($weblogs_cache_file); if ((time() - $modtime) > ($weblogs_cacheminutes * 60)) { $update = true; } } else { // doesn't exist $update = true; } if ($update) { // get a new copy $contents = implode('', file($weblogs_xml_url)); // file_get_contents not available < 4.3 $cachefp = fopen($weblogs_cache_file, "w"); fwrite($cachefp, $contents); fclose($cachefp); } return $update; } /** ** startElement() ** Callback function. Called at the start of a new xml tag. **/ function startElement($parser, $tagName, $attrs) { global $updated_timestamp, $all_links; if ($tagName == 'WEBLOGUPDATES') { //convert 'updated' into php date variable $updated_timestamp = strtotime($attrs['UPDATED']); //echo('got timestamp of ' . gmdate('F j, Y, H:i:s', $updated_timestamp) . "\n"); } else if ($tagName == 'WEBLOG') { // is this url in our links? if (isset($all_links[$attrs['URL']])) { $all_links[$attrs['URL']][1] = gmdate('YmdHis', $updated_timestamp - $attrs['WHEN']); //echo('set link id ' . $all_links[$attrs['URL']][0] . ' to date ' . $all_links[$attrs['URL']][1] . "\n"); } } } /** ** endElement() ** Callback function. Called at the end of an xml tag. **/ function endElement($parser, $tagName) { // nothing to do. } // get/update the cache file. // true return means new copy if (get_weblogs_updatedfile()) { // pre-load the links preload_links(); // Create an XML parser $xml_parser = xml_parser_create(); // Set the functions to handle opening and closing tags xml_set_element_handler($xml_parser, "startElement", "endElement"); // Open the XML file for reading $fp = fopen($weblogs_cache_file, "r") or die("Error reading XML data."); //echo('

');
    // Read the XML file 4KB at a time
    while ($data = fread($fp, 4096)) {
        // Parse each 4KB chunk with the XML parser created above
        xml_parse($xml_parser, $data, feof($fp))
                // Handle errors in parsing
                or die(sprintf("XML error: %s at line %d",
                               xml_error_string(xml_get_error_code($xml_parser)),
                               xml_get_current_line_number($xml_parser)));
    }
    
    // Close the XML file
    fclose($fp);

    // Free up memory used by the XML parser
    xml_parser_free($xml_parser);

    // now update the db with latest times
    update_links();

    //echo('

'); } // end if updated cache file ?>