I found following code from here, it is supposed to work and it has 2 errors.
First one is : Trying to get property of non-object on line 38, which starts from
if ($decoded_response->error)
Second error is Trying to get property of non-object on line 54 which starts from
echo("success" . $decoded_response->name);
So following code is my full code that gets access token.
<html>
<head></head>
<body>
<?php
require_once('src/facebook.php');
include_once('src/base_facebook.php');
$app_id = "413030352142786";
$app_secret = "518852750047ba579316a19d81c1e115";
$my_url = "134061970136571";
// known valid access token stored in a database
$access_token = "CAAF3ph9rwcIBAD5GrDLZBI6TFKlSb4jccEmIorCVjtfIeKIq7FjGKntMI5qnZCaNlXL8qy2g0gbjof3sRJYmgoDckG5ZBWpZBHjgZAn1e3sHTyxDdWwcCaZAiCylP5ayoWIMZBZCgNBL71I3myFYoDUYNZB4dH0xKJjAZD";
#$code = $_REQUEST["code"];
// If we get a code, it means that we have re-authed the user
//and can get a valid access_token.
if (isset($code)) {
$token_url="https://graph.facebook.com/oauth/access_token?client_id="
. $app_id . "&redirect_uri=" . urlencode($my_url)
. "&client_secret=" . $app_secret
. "&code=" . $code . "&display=popup";
$response = file_get_contents($token_url);
$params = null;
parse_str($response, $params);
$access_token = $params['access_token'];
}
// Attempt to query the graph:
$graph_url = "https://graph.facebook.com/me?"
. "access_token=" . $access_token;
$response = curl_get_file_contents($graph_url);
$decoded_response = json_decode($response);
//Check for errors
if ($decoded_response->error) {
// check to see if this is an oAuth error:
if ($decoded_response->error->type== "OAuthException") {
// Retrieving a valid access token.
$dialog_url= "https://www.facebook.com/dialog/oauth?"
. "client_id=" . $app_id
. "&redirect_uri=" . urlencode($my_url);
echo("<script> top.location.href='" . $dialog_url
. "'</script>");
}
else {
echo "other error has happened";
}
}
else {
// success
echo("success" . $decoded_response->name);
echo($access_token);
}
// note this wrapper function exists in order to circumvent PHP’s
//strict obeying of HTTP error codes. In this case, Facebook
//returns error code 400 which PHP obeys and wipes out
//the response.
function curl_get_file_contents($URL) {
$c = curl_init();
curl_setopt($c, CURLOPT_RETURNTRANSFER, 1);
curl_setopt($c, CURLOPT_URL, $URL);
$contents = curl_exec($c);
$err = curl_getinfo($c,CURLINFO_HTTP_CODE);
curl_close($c);
if ($contents) return $contents;
else return FALSE;
}
?>
</body>
</html>
Thank you for your reply !!!
Related
I am trying to echo my name but I got an error: Trying to get property of non-object. Please help. I also have problem getting the user access token though I have no problem getting the app access token.
<!DOCTYPE html>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title></title>
</head>
<body>
<?php
require_once('facebook.php');
$config = array();
$config['appId'] = "MY_APP_ID";
$config['secret'] ="MY_APP_SECRET";
$facebook = new Facebook($config);
$app_id = "MY_APP_ID";
$app_secret = "MY_APP_SECRET";
$my_url = "http://localhost:8080/samplewebsite/index.php/";
$code = $_REQUEST['code'];
if(empty($code))
{
$_SESSION['state'] = md5(uniqid(rand(),TRUE));
$dialog_url = "https://www.facebook.com/dialog/oauth?client_id="
. $app_id . "&redirect_uri=" . urlencode($my_url) . "&state=" . $_SESSION['state']
. "&scope=publish_actions,read_stream";
header("Location: " . $dialog_url);
}
else
{
echo "Hello, your OAuth code is " . $code . "<br>";
}
if ($_REQUEST['state'] == $_SESSION['state'])
{
$facebook->api('oauth/access_token',array(
'client_id' => $app_id,
'client_secret' => $app_secret,
'type' => 'client_cred',
'code' => $code,
));
$token = $facebook->getAccessToken();
echo "<br>" . "Hello, Your access_token is: " . $token;
$graph_url = "https://graph.facebook.com/me?access_token=" . $token;
//$user = json_decode(file_get_contents($graph_url));
//echo $user->name;
function curl($url) {
$ch = curl_init();
curl_setopt($ch, CURLOPT_HEADER, 0);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1); //Set curl to return the data instead of printing it to the browser.
curl_setopt($ch, CURLOPT_URL, $url);
$data = curl_exec($ch);
curl_close($ch);
return $data;
}
$user = json_decode(curl($graph_url));
echo $user->name;
}
?>
</body>
</html>
You are trying to echo $user->name but json_decode will not return an object by default. It returns an associative array unless you pass in TRUE as a second parameter.
So if you change:
$user = json_decode(curl($graph_url));
to:
$user = json_decode(curl($graph_url), TRUE);
It might work as you want it to. If not, try looking at what your curl() call returns and then what $user actually contains with something like var_dump().
According to the Facebook docs, using App_access_token is as simple as:
$appid = 'xxx';
$secret = 'yyyyyyyyy';
$facebook = new Facebook(array(
'appId' => $appid,
'secret' => $secret,
'cookie' => true,
));
$session = $facebook->getUser()>0;
if($session){
$access_token = 'access_token='.$facebook->getAccessToken();
$app_access_token = file_get_contents("https://graph.facebook.com/oauth/access_token?client_id=$appid&client_secret=$secret&grant_type=client_credentials");
}
My problem is that $access_token is fine but $app_access_token always returns false, what am I doing wrong?
-EDIT-
If I open the app_access_token URL in my browser I can see the access token! It seems to fail the file_get_contents... ?
The file_get_contents could be creating problems, may be due to some php config settings. (Discussion here: file_get_contents returns empty string)
I'll recommend you to use cURL instead, something like that-
function get_content($URL){
$ch = curl_init();
curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
curl_setopt($ch, CURLOPT_URL, $URL);
$data = curl_exec($ch);
curl_close($ch);
return $data;
}
echo get_content('http://example.com');
If the problem persists, re-check the values of app_id and secret in the url.
I file_get_contents not working try this :
Enable php ini setting for allow_url_fopen, then restart the server.
Here is the working code :
<?php
$facebook_appid = "facebook_appid"; // Facebook appplication id
$facebook_secret = "facebook_secret"; // Facebook secret id
$redirect_uri = "https://192.168.75.44/facebook_login/fb_login.php"; // return url to our application after facebook login ## should be SAME as in facebook application
//$cancel_url = ""; // redirect url if user denies the facebook login ## should be SAME as in facebook application
$scope = "user_photos,email,user_birthday,user_online_presence,offline_access"; // User permission for facebook
$code = $_REQUEST["code"]?$_REQUEST["code"]:"";
if(empty($code)) {
$_SESSION['state'] = time(); // CSRF protection
$dialog_url = "https://www.facebook.com/dialog/oauth?client_id=". $facebook_appid . "&redirect_uri=" . urlencode($redirect_uri) . "&state=". $_SESSION['state'] . "&scope=".$scope;
header("location:".$dialog_url);
}
if($_SESSION['state'] && ($_SESSION['state'] == $_REQUEST['state'])) {
$token_url = "https://graph.facebook.com/oauth/access_token?". "client_id=" . $facebook_appid . "&redirect_uri=" . urlencode($redirect_uri). "&client_secret=" . $facebook_secret . "&code=" . $code;
$response = #file_get_contents($token_url);
$params = null;
parse_str($response, $params);
echo $params['access_token'];
}
?>
I have this problem with my code, iam trying to upload an image to a users wall, but it give me following error:
Fatal error: Uncaught OAuthException: An active access token must be used to query information about the current user. thrown in /var/www/parkourjams.dk/emilaagaard/customers/fbgen/core/facebook/base_facebook.php on line 1238
My code is:
<?php
session_start();
require 'facebook/facebook.php';
$app_id = "438648619527874";
$app_secret = "HIDDEN";
$facebook = new Facebook(array(
'appId' => $app_id,
'secret' => $app_secret,
'fileUpload' => true,
'cookie' => true
));
$post_login_url = "http://emilaagaard.dk/customers/fbgen/core/test.php";
$code = $_REQUEST["code"];
if (empty($code)) {
$dialog_url= "http://www.facebook.com/dialog/oauth?"
. "client_id=" . $app_id
. "&redirect_uri=" . urlencode( $post_login_url)
. "&scope=publish_stream";
echo("<script>top.location.href='" . $dialog_url
. "'</script>");
} else {
$token_url="https://graph.facebook.com/oauth/access_token?"
. "client_id=" . $app_id
. "&redirect_uri=" . urlencode( $post_login_url)
. "&client_secret=" . $app_secret
. "&code=" . $code;
// curl
$ch = curl_init();
curl_setopt($ch, CURLOPT_URL, $token_url);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
$response = curl_exec($ch);
curl_close($ch);
$params = null;
parse_str($response, $params);
$access_token = $params['access_token'];
echo "Token: " . $access_token . "<br /><br />";
$graph_url= "https://graph.facebook.com/me/photos?"
. "access_token=" .$access_token;
// Post it!
$user = $facebook->getUser();
$args = array(
'message' => 'Photo Caption',
'image' => '#'.realpath("ac.png")
);
$user = $facebook->getUser();
$user_profile = $facebook->api('/me');
if ($user) {
print_r($user);
echo "Username: " . $user_profile['username'];
try {
// We have a valid FB session, so we can use 'me'
$data = $facebook->api('/me/photos', 'post', $args);
echo $data;
} catch (FacebookApiException $e) {
print $e;
}
} else {
echo "Dead user";
$loginUrl = $facebook->getLoginUrl();
print ', try login</script>';
}
echo '</body></html>';
}
?>
I really hope for someone out there can help me, iam tired and have probably code-blinded my self for staying up all night after a party to finish this.
Thanks!
if you are testing it on local server
insert
curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, false);
after curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
insert
Facebook::$CURL_OPTS[CURLOPT_SSL_VERIFYPEER] = false;
$facebook->setAccessToken($access_token);
before $user = $facebook->getUser();
A few days ago I suddenly started getting 400 errors in my app. It was completely fine before.
Warning: file_get_contents(https://graph.facebook.com/me/accounts?access_token=XXXXXXXXXXXX) [function.file-get-contents]: failed to open stream: HTTP request failed! HTTP/1.0 400 Bad Request
It's really frustrating. I can get the access_token just fine but I can't get "https://graph.facebook.com/me/accounts?access_token=XXXXXXXXXXXX". I know that URL is correct because I can see the content by loading it on the browser.
if(!$code){
$display = 'page';
$scope = 'manage_pages';
$_SESSION['state'] = md5(uniqid(rand(), TRUE)); //CSRF protection
$oauth_url = "http://www.facebook.com/dialog/oauth?client_id="
. $app_id . "&redirect_uri=" . urlencode($my_url) . "&state="
. $_SESSION['state'];
echo "<script type=\"text/javascript\">\ntop.location.href = \"$oauth_url\";\n</script>";
};
if ($code && $_REQUEST['state'] == $_SESSION['state']){
$token_url = "https://graph.facebook.com/oauth/access_token?"
. "client_id=" . $app_id
. "&client_secret=" . $app_secret . "&code=" . $code . "&redirect_uri=" . $my_url;
$response = file_get_contents($token_url);
$params = null;
parse_str($response, $params);
$graph_url = "https://graph.facebook.com/me/accounts?access_token=" . $params['access_token'];
$user = json_decode(file_get_contents($graph_url));
$pages_data = $user->data;
}
Any help will be VERY appreciated!
I make facebook application using facebook guide
When user allow application access than the index page redirect it to tst.php which directly post on user wall
I use the below code in index.php:
index.php
<?php
require_once 'facebook-php-sdk/src/facebook.php';
$facebook = new Facebook(array(
'appId' => 'app_id',
'secret' => 'app_secret',
'cookie' => true,
));
$app_id = app_id;
$canvas_page = 'http://apps.facebook.com/tstsample/tst.php';
$auth_url = "http://www.facebook.com/dialog/oauth?client_id=" .
$app_id . "&redirect_uri=" . urlencode($canvas_page) .
"&scope=email offline_access publish_stream";
$signed_request = $_REQUEST["signed_request"];
list($encoded_sig, $payload) = explode('.', $signed_request, 2);
$data = json_decode(base64_decode(strtr($payload, '-_', '+/')), true);
if (empty($data["user_id"])) {
echo("<script> top.location.href='" . $auth_url . "'</script>");
} else {
echo ("Welcome User: " . $data["user_id"]);
}
?>
And below is the code which I use in tst.php which use to directly post on user wall:
tst.php
<?php
$feedurl = "https://graph.facebook.com/134875956586326";
$ogurl = "http://www.facebook.com/apps/application.php?id=134875956586326";
$app_id = “134875956586326”;
$app_secret = "app_secret";
$mymessage = urlencode("Hello World!");
$access_token_url = "https://graph.facebook.com/oauth/access_token";
$parameters = "type=client_credentials&client_id=" .
$app_id . "&client_secret=" . $app_secret;
$access_token = file_get_contents($access_token_url .
"?" . $parameters);
$apprequest_url = "https://graph.facebook.com/feed";
$parameters = "?" . $access_token . "&message=" .
$mymessage . "&id=" . $ogurl . "&method=post";
$myurl = $apprequest_url . $parameters;
$result = file_get_contents($myurl);
echo "post_id" . $result;
?>
And after i run the application two errors occur
I see the access allow page than it stops on index page
After manually going on the tst.php as I mentioned in the above code, I receive PHP errors
Below are the errors:
Warning: file_get_contents(https://graph.facebook.com/oauth/access_token?type=client_credentials&client_id=�134875956586326�&client_secret=606636c88cd434c5140986d8472fc639)
[function.file-get-contents]: failed to open stream: HTTP request failed!
HTTP/1.0 400 Bad Request in /home5/onkhuras/public_html/escribir/tstsample/tst.php
on line 14
Warning: file_get_contents(https://graph.facebook.com/feed?&message=Hello+World%21&id=http://www.facebook.com/apps/application.php?id=134875956586326&method=post)
[function.file-get-contents]: failed to open stream: HTTP request failed!
HTTP/1.0 400 Bad Request in /home5/onkhuras/public_html/escribir/tstsample/tst.php
on line 21
post_id
How do I resolve these two errors?
Note: I get these two codes from Facebook which I use in index.php and txt.php
Check the authentication guide again - https://developers.facebook.com/docs/authentication/.
You need the code returned by /dialog/oauth to get an access_token from https://graph.facebook.com/oauth/access_token
I had a similar problem (the second error message) and got it resolved by using my app id for $ogurl like this (the last few lines in your tst.php file):
...
$apprequest_url = "https://graph.facebook.com/feed";
$parameters = "?" . $access_token . "&message=" .
$mymessage . "&id=" . $app_id . "&method=post";
$myurl = $apprequest_url . $parameters;
$result = file_get_contents($myurl);
echo "post_id" . $result;
?>
In my case that lead to posting the message to the app wall.