获取alexa排名

<?php/** * Get Alexa Rank * * @param Domain Name $Domain * @return Alexa Rank  * @copyright SanyWork http://www.sanywork.cn/ */$Domain='tuniu.com';echo getAlexaRank($Domain);function getAlexaRank($Domain) {$line = "";$data = "";$URL = "http://data.alexa.com/data/?cli=10&dat=snba&ver=7.0&url=" . $Domain;$fp = fopen ( $URL, "r" );if ($fp) {while ( ! feof ( $fp ) ) {$line = fgets ( $fp );$data .= $line;}$p = xml_parser_create ();xml_parse_into_struct ( $p, $data, $vals );xml_parser_free ( $p );for($i = 0; $i < count ( $vals ); $i ++) {if ($vals [$i] ["tag"] == "POPULARITY") {return $vals [$i] ["attributes"] ["TEXT"];}}}}?>