如何使我的Facebook像脚本循环每3秒一次？

I am building a Facebook page like counter. I want to be able to get page like updates roughly every 2-3 seconds. The result will be sent to a sql database then sent to an Arduino. First of all though, I need to get the likes from the desired page. I have the PHP script below that works great but you have to load the page every time to get an updated like count.

Would you be able to use a while loop with some sort of 2-3 second delay? or what you recommend in situation? p.s I used Dan Bilzerian's FB page as an example because his likes just keep going up up up, its ridiculous.

Thanks

function facebook_count($url){
 
    // Query in FQL
    $fql  = "SELECT like_count";
    $fql .= " FROM link_stat WHERE url = '$url'";
 
    $fqlURL = "https://api.facebook.com/method/fql.query?format=json&query=" . urlencode($fql);
 
    // Facebook Response is in JSON
    $response = file_get_contents($fqlURL);
    return json_decode($response);
 
}
 
 
$fb = facebook_count('https://www.facebook.com/danbilzerianofficial');
 

// facebook like count
echo $fb[0]->like_count;

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