$xmldata =file_get_contents($xml_url);
$xmlstring = simplexml_load_string($xmldata,'SimpleXMLElement',LIBXML_NOCDATA);
$value_array = json_decode(json_encode($xmlstring),true);
$url = [];
for ($i =0;$i < count($value_array['url']);$i++){
    // echo $value_array['url'][$i]['loc']."
";
    $url[]= $value_array['url'][$i]['loc'];
}
//百度推送接口一次只支持推送2000条数据，所以超过2000条的话需要分组推送
$url_group = array_chunk($url,2000);
$count=count($url_group);
for($i=0;$i<$count;$i++){
    $ch = curl_init();
    $options = array(
       CURLOPT_URL => $baidu_api,
       CURLOPT_POST => true,
       CURLOPT_RETURNTRANSFER => true,
       CURLOPT_POSTFIELDS => implode("
",$url_group[$i]),
       CURLOPT_HTTPHEADER => array('Content-Type:text/plain'),
    );
    curl_setopt_array($ch, $options);
    $result =curl_exec($ch);
    curl_close($ch);
    echo $result;
}
?>