Using Curl for Adsense mobile adcode

<?php

$GLOBALS['google']['client']='ca-mb-pub-9497350216361157';
$GLOBALS['google']['https']=read_global('HTTPS');
$GLOBALS['google']['ip']=read_global('REMOTE_ADDR');
$GLOBALS['google']['markup']='xhtml';
$GLOBALS['google']['output']='xhtml';
$GLOBALS['google']['ref']=read_global('HTTP_REFERER');
$GLOBALS['google']['slotname']='4327384226';
$GLOBALS['google']['url']=read_global('HTTP_HOST') . read_global('REQUEST_URI');
$GLOBALS['google']['useragent']=read_global('HTTP_USER_AGENT');
$google_dt = time();
google_set_screen_res();
google_set_muid();
google_set_via_and_accept();
function read_global($var) {
  return isset($_SERVER[$var]) ? $_SERVER[$var]: '';
}

function google_append_url(&$url, $param, $value) {
  $url .= '&' . $param . '=' . urlencode($value);
}

function google_append_globals(&$url, $param) {
  google_append_url($url, $param, $GLOBALS['google'][$param]);
}

function google_append_color(&$url, $param) {
  global $google_dt;
  $color_array = explode(',', $GLOBALS['google'][$param]);
  google_append_url($url, $param,
                    $color_array[$google_dt % count($color_array)]);
}

function google_set_screen_res() {
  $screen_res = read_global('HTTP_UA_PIXELS');
  if ($screen_res == '') {
    $screen_res = read_global('HTTP_X_UP_DEVCAP_SCREENPIXELS');
  }
  if ($screen_res == '') {
    $screen_res = read_global('HTTP_X_JPHONE_DISPLAY');
  }
  $res_array = preg_split('/[x,*]/', $screen_res);
  if (count($res_array) == 2) {
    $GLOBALS['google']['u_w']=$res_array[0];
    $GLOBALS['google']['u_h']=$res_array[1];
  }
}

function google_set_muid() {
  $muid = read_global('HTTP_X_DCMGUID');
  if ($muid != '') {
    $GLOBALS['google']['muid']=$muid;
     return;
  }
  $muid = read_global('HTTP_X_UP_SUBNO');
  if ($muid != '') {
    $GLOBALS['google']['muid']=$muid;
     return;
  }
  $muid = read_global('HTTP_X_JPHONE_UID');
  if ($muid != '') {
    $GLOBALS['google']['muid']=$muid;
     return;
  }
  $muid = read_global('HTTP_X_EM_UID');
  if ($muid != '') {
    $GLOBALS['google']['muid']=$muid;
     return;
  }
}

function google_set_via_and_accept() {
  $ua = read_global('HTTP_USER_AGENT');
  if ($ua == '') {
    $GLOBALS['google']['via']=read_global('HTTP_VIA');
    $GLOBALS['google']['accept']=read_global('HTTP_ACCEPT');
  }
}

function google_get_ad_url() {
  $google_ad_url = 'http://pagead2.googlesyndication.com/pagead/ads?';
  google_append_url($google_ad_url, 'dt',
                    round(1000 * array_sum(explode(' ', microtime()))));
  foreach ($GLOBALS['google'] as $param => $value) {
    if (strpos($param, 'color_') === 0) {
      google_append_color($google_ad_url, $param);
    } else if (strpos($param, 'url') === 0) {
      $google_scheme = ($GLOBALS['google']['https'] == 'on')
          ? 'https://' : 'http://';
      google_append_url($google_ad_url, $param,
                        $google_scheme . $GLOBALS['google'][$param]);
    } else {
      google_append_globals($google_ad_url, $param);
    }
  }
  return $google_ad_url;
}

$google_ad_handle = @fopen(google_get_ad_url(), 'r');
if ($google_ad_handle) {
  while (!feof($google_ad_handle)) {
    echo fread($google_ad_handle, 8192);
  }
  fclose($google_ad_handle);
}

?>