simplexml_load_file error in PHP 5.3

This error comes due to "http:// wrapper is disabled in the server configuration by allow_url_fopen=0" .For avoiding this issue we need to override this setting to On instead off.In my view most of shared hosting servers do not allow you to do these setting through either ini_set('allow_url_fopen', 'on'); or htaccess overriding.So instead of trying these methods I suggest a way to fetch that feed is as follows.Using CURL we need to fetch the content of feed xml to a variable.Then process our simplexml file operations .

Example

$feed ='http://api.twitter.com/1/statuses/user_timeline.rss?screen_name=mytwittername';
$ch = curl_init();
curl_setopt($ch, CURLOPT_URL, $feed);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
// get the result of http query
$output = curl_exec($ch);
curl_close($ch);
$xml = simplexml_load_file($output);

If you are not allowed to edit php.ini in server you can use curl to get xml and read xml stirng as below.

function home_page_parser($feedURL) {
    $rss = simplexml_load_file(curlXML($feedURL);
    $i = 0;

    echo  "<ul>";

    foreach ($rss->channel->item as $feedItem) {
        $i++;
        $myDate = ($feedItem->pubDate);
        $dateForm = explode(" ", $myDate);
        echo "<li class=\"rss-feed\"><a href=\"$feedItem->link\" title=\"$feedItem->title\" target=\"_blank\">".$feedItem->title."</a><br />" .$feedItem->pubDate. "</li>";

    if($i >= 3) break;

    echo "</ul>";
    }
}

function curlXML($url){
   $ch = curl_init();
   curl_setopt($ch, CURLOPT_URL, $url);
   curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
   // get the result of http query
   $output = curl_exec($ch);
   curl_close($ch);

   return $output;
}

ini_set("allow_url_fopen", 1);

This will set allow url open = On in php.ini file but you need to restart php in easyphp or xamp or wamp or in hosting.