baza-otvetov.ru/quiz - PARSER

<?php
header('Content-Type: text/json; charset=utf-8');
$opts = array(
  'http'=>array(
    'method'=>"GET",
    'header'=>"x-requested-with: XMLHttpRequest\r\n"
  )
);
$context = stream_context_create($opts);
$file = file_get_contents('https://baza-otvetov.ru/quiz/ask', false, $context);
$content = explode("</script>", $file)[1];
$p = xml_parser_create();
     xml_parse_into_struct($p, $content, $vals, $index);
     xml_parser_free($p);
$id = $vals[0]["attributes"]["ID"];
$question = $vals[0]["value"];
$othercont = explode("</table>", explode("<table border='0' cellspacing='10'>", $content)[1])[0];
$doc = new DOMDocument();
$doc->loadHTML('<meta http-equiv="Content-Type" content="text/html; charset=utf-8">' . $othercont);
$tags = $doc->getElementsByTagName('h4');
$_val = "";
$vals = array();
for ($i = 0; $i < $tags->length; $i++) {
    $val = $tags->item($i)->nodeValue;
    $data = array(
        'q_id' => $id,
        'answer' => $val
    );
    $postString = http_build_query($data, '', '&');
    $opts = array('http' =>
        array(
            'method'  => 'POST',
            'header'  => "Content-type: application/x-www-form-urlencoded\r\n" .
                        "x-requested-with: XMLHttpRequest\r\n",
            'content' => $postString
        )
    );
    $context = stream_context_create($opts);
    $result = file_get_contents('https://baza-otvetov.ru/quiz/check', false, $context);
    $pravval = explode("<br /><br />", explode("<h3 style='color:#339966'>", $result)[1])[0];
    if ($pravval == "Правильно!") $_val = $val;
    array_push($vals, $val);
}
$resu = array(
    'question'=> $question,
    'answers'=> $vals,
    'solve'=> $_val
);
echo json_encode($resu, JSON_UNESCAPED_UNICODE);