scraping for program guide. get info in json and save result data to xml

directv.php

<?php
// programador: juanpablocs21@gmail.com
// 
class directv
{
  var $url = "http://www.directv.com.ve/movil/ProgramGuide/ProgramGuide";
  
  public function getProgramation($ids)
  {
    $html = $this->html($this->url);
    preg_match('#<table id="program-guide"(?:[^>]+)>(.*?)</table>#si', $html, $data);
    preg_match_all('#<tr>(.*?)</tr>#si', $data[1], $tbody);
    
    $results = empty($tbody[1]) ? [] : $tbody[1];

    $tmp = [];
    foreach ($results as $result) {
        $data = $this->matchInfoData($result);
        if($data){
          $tmp[] = $data;
        }
    }
    if(count($tmp)<1) return ['error'=>true, 'message'=>'error get scraping'];
    if(is_array($ids) && count($ids)>0)
    {
      $tmp2 = [];
      foreach ($ids as $id) {
        $key = array_search($id, array_column($tmp, 'channel_number'));
        if($key !== false){
          $tmp2[] = $tmp[$key];
        }
      }
      $tmp = $tmp2;
    }
    return $tmp;
  }
  private function matchInfoData($html){
    $html = preg_replace('/\s+/', ' ', $html);
    preg_match('#href="/movil/ProgramGuide/ProgrammingDetails\?strEventID=([^"]+)"#si', $html, $r);
    preg_match('#<strong>([^<]+)</strong>#si', $html, $t);
    preg_match('#<dd><strong>Duraci&\#243\;n:</strong> (.*?) </dd>#si', $html, $d);
    
    if(!empty($r[1])){
      preg_match('#<p>([^<]+)<br />([^<]+)</p>#si', $html, $channel);
      return [
        'id'              => $r[1],
        'title'           => $t[1],
        'duration'        => $d[1],
        'channel_number'  => $channel[1],
        'channel_name'    => $channel[2],
      ];
    }
    return false;
  }
  private function html($url)
  {
    $ch = curl_init();
    curl_setopt($ch, CURLOPT_REFERER, "http://www.google.com/");
    curl_setopt($ch, CURLOPT_USERAGENT, "Mozilla/5.0 (Windows; U; Windows NT 5.1; es-ES; rv:1.9.0.3) Gecko/2008092417 Firefox/3.0.3");
    curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
    curl_setopt($ch, CURLOPT_COOKIEJAR, __dir__."/cookie.txt");
    curl_setopt($ch, CURLOPT_COOKIEFILE, __dir__."/cookie.txt");
    curl_setopt($ch, CURLOPT_CONNECTTIMEOUT, 4); // controla tiempo de espera al buscar.
    curl_setopt($ch, CURLOPT_URL, $url);
    $buffer = curl_exec($ch);
    curl_close($ch);
    return $buffer;
  }
}
// run baby
$ids = @$_GET['ids'];
$ids = ( !empty($ids) ) ? explode(',', $ids) : false;
$d = new directv;
$json = $d->getProgramation($ids);
if(!empty($_GET['save'])){
  
  $file = 'xmls/channels.xml';
  if(!is_writable($file))
    die('error folder o archivo no existe o no tiene permiso 777');
  $dom = new DomDocument('1.0', 'UTF-8'); 
  $channels = $dom->appendChild($dom->createElement('canales'));
  for ($i = 0; $i < count($json); $i++) {
    $channel = $dom->createElement('canal');
    $channels->appendChild($channel);
    $id = $dom->createAttribute('id');
    $id->appendChild($dom->createTextNode($json[$i]['id']));
    $channel->appendChild($id);
    $channel_name = $dom->createAttribute('canal');
    $channel_name->appendChild($dom->createTextNode($json[$i]['channel_name']));
    $channel->appendChild($channel_name);
    $title = $dom->createAttribute('programa');
    $title->appendChild($dom->createTextNode($json[$i]['title']));
    $channel->appendChild($title);
    $duration = $dom->createAttribute('duracion');
    $duration->appendChild($dom->createTextNode($json[$i]['duration']));
    $channel->appendChild($duration);
  }
  $dom->formatOutput = true;
  $dom->saveXML();
  $dom->save($file);
  die('guardo correctamente');
}
print json_encode($json);