Question

I am trying to parse messages from a public Facebook fan page wall, but it returns a blank page.

$source = "http://www.facebook.com/?sk=wall&filter=2";
libxml_use_internal_errors(TRUE);
$dom = new DOMDocument();
$dom->loadHTML($source);
$xml = simplexml_import_dom($dom);
libxml_use_internal_errors(FALSE);
$message = $xml->xpath("//span[@class='messageBody']");

return (string)$message[0] . PHP_EOL;

Answer 1

Yet another approach would be to use the JSON from the Graph API

$posts = json_decode(
    file_get_contents('https://graph.facebook.com/swagbucks/posts')
);
foreach($posts->data as $post) {
    echo $post->message, PHP_EOL;
}