Detect yahoo online status

Detect yahoo status

$img = file_get_contents('http://opi.yahoo.com/online?u='.$yahoo.'&m=l&t=12&l=us');           
if( strpos($img,'NOT ONLINE') )
{
      echo '';
}
else
{
   echo '';
}

Detect skype status

$url='http://mystatus.skype.com/balloon/yourskype';
$size= getSizeFile($url);
if($size==1808)
echo 'online';
else
echo 'offline';

   function getSizeFile($url) {
    if (substr($url,0,4)=='http') {
        $x = array_change_key_case(get_headers($url, 1),CASE_LOWER);
        if ( strcasecmp($x[0], 'HTTP/1.1 200 OK') != 0 ) { $x = $x['content-length'][1]; }
        else { $x = $x['content-length']; }
    }
    else { $x = @filesize($url); }

    return $x;
}