PHP - How Get specific data from Facebook Page Graph API

Question

I have the following PHP code :

<?php
require_once 'library/facebook.php';
include '../constants.php';

define('TOKEN_FILE', 'fb_page_accestoken.txt'); // dont need to change this
$fb = new Facebook(array(
  'appId' => FB_APP_ID,
    'secret' => FB_APP_SECRET,
    'cookie' => true,
));

$access_token = file_get_contents('fb_app_token.txt');

$response  = "https://graph.facebook.com/me/accounts?access_token=".$access_token;
echo $response;

?>

The above creates a URL to access my Facebook Graph API. When I copy it and paste it in the browser url I get the following:

{
   "data": [
      {
         "category": "Media/news/publishing",
         "name": "My Sandbox",
         "access_token": "abcdefghijklmnopqrstuvwxyz123456",
         "perms": [
            "ADMINISTER",
            "EDIT_PROFILE",
            "CREATE_CONTENT",
            "MODERATE_CONTENT",
            "CREATE_ADS",
            "BASIC_ADMIN"
         ],
         "id": "123456789"
      },

How can I extract particular information such as the access_token value in my php file?

Thank you

Hi, I was aware of that. When I tried var_dump(json_decode($response)); var_dump(json_decode($response, true)); Nothing worked — user3173207
– user3173207, Commented Jan 13, 2014 at 10:45
It displays nothing - I get the following error PHP Notice: Trying to get property of non-object in ****** on line 26 — user3173207
– user3173207, Commented Jan 13, 2014 at 11:00
Use this $response = json_decode(file_get_contents("your url end point",true); and then print_r($response); see what you get — Abhik Chakraborty
– Abhik Chakraborty, Commented Jan 13, 2014 at 11:03
Also you need to have manage_pages permission for the user for which you are trying to access the data — Abhik Chakraborty
– Abhik Chakraborty, Commented Jan 13, 2014 at 11:21

Yami · Accepted Answer · 2014-01-13 10:46:34Z

1

Be aware, that you are appending the URL to $response.. not the content! Do:

$response = file_get_contents("http..");

& use:

$response = json_decode($response);

to get the response as a php object. You can then access your values normally:

$access_token = $response->access_token;

answered Jan 13, 2014 at 10:46

Yami

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4 Comments

user3173207 Over a year ago

Hi, when I echo $response->access_token; nothing is being displayed after following your modificaitons.

Yami Over a year ago

do var_dump($response); die; to see the content of the variable.. what does it output?

user3173207 Over a year ago

Now its giving me null

Yami Over a year ago

Make sure you replaced the "http://.." with your complete url + request token. var_dump this before using json_decode.. it should contain the json object.

Abhik Chakraborty · Accepted Answer · 2014-01-13 12:52:12Z

1

Ok Your code needs to be this way, you are still not doing json_decode($jsondata,true); Here is the correct code.

define('TOKEN_FILE', 'fb_page_accestoken.txt'); // dont need to change this
$fb = new Facebook(array(
  'appId' => FB_APP_ID,
    'secret' => FB_APP_SECRET,
    'cookie' => true,
));

$access_token = file_get_contents('fb_app_token.txt');
$responsez = file_get_contents("https://graph.facebook.com/me/accounts?access_token=".$access_token);
$response  =  json_decode($responsez,true);

The above will return an array.

From that array you can display the access token as

$data =   $response['data'];
echo $data['access_token'];

or directly as

echo $response['data']['access_token'];

If you do not want json_decode() as array then just do as

define('TOKEN_FILE', 'fb_page_accestoken.txt'); // dont need to change this
    $fb = new Facebook(array(
      'appId' => FB_APP_ID,
        'secret' => FB_APP_SECRET,
        'cookie' => true,
    ));

    $access_token = file_get_contents('fb_app_token.txt');
    $responsez = file_get_contents("https://graph.facebook.com/me/accounts?access_token=".$access_token);
    $response  =  json_decode($responsez);

echo $response->data->access_token ;

You can also use the Graph api calls as

define('TOKEN_FILE', 'fb_page_accestoken.txt'); // dont need to change this
$fb = new Facebook(array(
  'appId' => FB_APP_ID,
    'secret' => FB_APP_SECRET,
    'cookie' => true,
));

$access_token = file_get_contents('fb_app_token.txt');
$params = array(
    'access_token' => $access_token
   );

$response = $fb->api('me/accounts','GET',$params);

Your response will have the data

NOTE : Make sure that this api end point requires manage_pages permission

https://developers.facebook.com/docs/graph-api/reference/user/accounts/

edited Jan 13, 2014 at 12:52

answered Jan 13, 2014 at 11:53

Abhik Chakraborty

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6 Comments

user3173207 Over a year ago

Hi, it gives me PHP Notice: Array to string conversion in and the output as Array

Abhik Chakraborty Over a year ago

This line gives you what Please post it $responsez = file_get_contents("graph.facebook.com/me/…);

Abhik Chakraborty Over a year ago

I have created a test page how json encode and decode works codepad.org/Mjb9A8as

Abhik Chakraborty Over a year ago

I have updated the answer again you can do as $responsez = file_get_contents("graph.facebook.com/me/…); $response = json_decode($responsez); echo $response->data->access_token ;

user3173207 Over a year ago

Hi, did you update it as your code is like mine exactly. Thanks

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