百度api网址提交的php怎么写？

网站用WellCMS，网站地图是txt格式，www.abc.com/sitemap.txt
文件中的格式如下：
https://www.abc.com/mulu/11
https://www.abc.com/mulu/12
https://www.abc.com/mulu/13
https://www.abc.com/mulu/14
请教，百度API批量提交的php文件怎么获取批量网址？谢谢


header('Content-Type: text/html; charset=utf-8');


$html = file_get_contents("http://www.abc.com/sitemap.txt");
$regex = '#(.+?)#';  //这个地方不会写。。。。

preg_match_all($regex,$html,$mats);
$urls = $mats[1];
$chunk_result = array_chunk($urls,500);

//百度收录提交
foreach($chunk_result as $k){
    $urls=$k;

    $api = 'hhttp://data.zz.baidu.com/urls?site=https://www.abc.com&token=百度token';
    $ch = curl_init();
    $options =  array(
        CURLOPT_URL => $api,
        CURLOPT_POST => true,
        CURLOPT_RETURNTRANSFER => true,
        CURLOPT_POSTFIELDS => implode("\n", $urls),
        CURLOPT_HTTPHEADER => array('Content-Type: text/plain'),
    );
    curl_setopt_array($ch, $options);
    $result = curl_exec($ch);
    echo '百度收录提交' . $result . '
';
} 

?>