How to check Justin.tv online / offline status

<?php
$streamers = array(
array('EG.IdrA', 'eg_idra', 'jtv') //................ . . ... ... . .. . ..................
);

echo '<ul>';
for($i=0 ; $i<count($streamers) ; $i++) {
$url = substr(strstr(file_get_contents('http://www.justin.tv/embed/customize?kind=video&channel='.$streamers[$i][1]), 'channel_live'),0,22);

if ($url == "channel_live'] = true;") {
echo '<li><a href="http://www.justin.tv/'.$streamers[$i][1].'" target="_blank">'.$streamers[$i][0].'</a></li>';
}
};
echo '</ul>';
?>