$ uid没有拿到价值

Question

I am trying to download Facebook profile picture for Facebook application. For this, I'm getting the value of Facebook username/id in $uid. echo $uid is showing the correct result but it's not picking up the value when I use it in the following code:

echo $uid;
$imgDestinationPath = 'pic.jpg';
$link = 'http://graph.facebook.com/$uid/picture?type=large';
$content = file_get_contents($link);
file_put_contents($imgDestinationPath, $content);
error_reporting(E_ALL);

Moreover, when I put the Facebook username instead of $uid, it downloads the picture then. Please help. I'm new to PHP.

Answer 1

please use the " " in this statement

$link = "http://graph.facebook.com/$uid/picture?type=large";

will solve the problem