title: Facebook PHP api, other users picture, how to obtain their ID?
body: <p>I need to make a php web page, that takes the current user FB profile picture.</p>
  
  <p>So I followed these steps:
  1. Created a Facebook app (obviously :-D )
  2. Obtained the access token
  3. Created the GET request</p>
  
  <pre><code>$fb = new \Facebook\Facebook([
     'app_id' =&gt; 'xxx',
     'app_secret' =&gt; 'xxx',
     'default_graph_version' =&gt; 'v3.3',
     'default_access_token' =&gt; 'xxx',
  ]);
  
  $helper = $fb-&gt;getRedirectLoginHelper();
  $accessToken = $helper-&gt;getAccessToken();
  $oAuth2Client = $fb-&gt;getOAuth2Client();
  
  $response = $fb-&gt;get("me?fields=id,link,picture.width(9999)");
  </code></pre>
  
  <p>But "$response" always returns my profile, even if another user enter his own FB user/password.</p>
  
  <p>Perhaps the problem is the url in the get "me", perhaps I need the user ID, but how???</p>
  
  <p>Thanks in advance</p>