I'm trying to get the access token following the documentation
First, I have to redirect user to the Facebook login page. The response looks like:
http://localhost/?code=AQDcY0NnkyHy2ixcmn8CR2W3F21DvXFwcyP4NgvalTIan4pCC19uInXLKNPr48FkL2VKPbY2OL98zw5XrD7lbrZ_rnT0zDs4Rumc1QOLAfD0r3Ekpac9tKmBMEImIawOm8yxmR92IL1
Fine, we can finally exchange code for an Acess Token
if(empty($_GET['code'])){
header("Location :https://www.facebook.com/v5.0/dialog/oauth?
client_id={app-id}
&redirect_uri={"h t t p s:// www.domain.com/login"}
&state={"{st=state123abc,ds=123456789});
}
else{
$ch = curl_init();
curl_setopt($ch, CURLOPT_URL, 'https://graph.facebook.com/v5.0/oauth/access_token?
client_id={app-id}
&redirect_uri={redirect-uri}
&client_secret={app-secret}
&code=$_GET['code']');
curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
$result = curl_exec($ch);
if (curl_errno($ch)) {
echo 'Error:' . curl_error($ch);
}
curl_close($ch);
}
And here I've received suprise:
string(0) ""
What is wrong?
This what I used on one my project read comments in it.
constant
(define) can be changed to example url = "url";
//The username or email address of the account.
define('USERNAME', 'myusername');
//The password of the account.
define('PASSWORD', 'mypassword');
//Set a user agent. This basically tells the server that we are using Chrome ;)
define('USER_AGENT', 'Mozilla/5.0 (Windows NT 5.1) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/35.0.2309.372 Safari/537.36');
//Where our cookie information will be stored (needed for authentication).
define('COOKIE_FILE', 'cookie.txt');
//URL of the login form.
define('LOGIN_FORM_URL', 'http://example.com/login.php');
//Login action URL. Sometimes, this is the same URL as the login form.
define('LOGIN_ACTION_URL', 'http://example.com/login-check.php');
//An associative array that represents the required form fields.
//You will need to change the keys / index names to match the name of the form
//fields.
$postValues = array(
'username' => USERNAME,
'password' => PASSWORD
);
//Initiate cURL.
$curl = curl_init();
//Set the URL that we want to send our POST request to. In this
//case, it's the action URL of the login form.
curl_setopt($curl, CURLOPT_URL, LOGIN_ACTION_URL);
//Tell cURL that we want to carry out a POST request.
curl_setopt($curl, CURLOPT_POST, true);
//Set our post fields / date (from the array above).
curl_setopt($curl, CURLOPT_POSTFIELDS, http_build_query($postValues));
//We don't want any HTTPS errors.
curl_setopt($curl, CURLOPT_SSL_VERIFYHOST, false);
curl_setopt($curl, CURLOPT_SSL_VERIFYPEER, false);
//Where our cookie details are saved. This is typically required
//for authentication, as the session ID is usually saved in the cookie file.
curl_setopt($curl, CURLOPT_COOKIEJAR, COOKIE_FILE);
//Sets the user agent. Some websites will attempt to block bot user agents.
//Hence the reason I gave it a Chrome user agent.
curl_setopt($curl, CURLOPT_USERAGENT, USER_AGENT);
//Tells cURL to return the output once the request has been executed.
curl_setopt($curl, CURLOPT_RETURNTRANSFER, true);
//Allows us to set the referer header. In this particular case, we are
//fooling the server into thinking that we were referred by the login form.
curl_setopt($curl, CURLOPT_REFERER, LOGIN_FORM_URL);
//Do we want to follow any redirects?
curl_setopt($curl, CURLOPT_FOLLOWLOCATION, false);
//Execute the login request.
curl_exec($curl);
//Check for errors!
if(curl_errno($curl)){
throw new Exception(curl_error($curl));
}
//We should be logged in by now. Let's attempt to access a password protected page
curl_setopt($curl, CURLOPT_URL, 'http://example.com/protected-page.php');
//Use the same cookie file.
curl_setopt($curl, CURLOPT_COOKIEJAR, COOKIE_FILE);
//Use the same user agent, just in case it is used by the server for session validation.
curl_setopt($curl, CURLOPT_USERAGENT, USER_AGENT);
//We don't want any HTTPS / SSL errors.
curl_setopt($curl, CURLOPT_SSL_VERIFYHOST, false);
curl_setopt($curl, CURLOPT_SSL_VERIFYPEER, false);
//Execute the GET request and print out the result.
echo curl_exec($curl);
now we come to your question
There are several ways to get access tokens, To generate an app access token, you need :
One of solution :
curl -X GET "https://graph.facebook.com/oauth/access_token
?client_id={your-app-id}
&client_secret={your-app-secret}
&grant_type=client_credentials"
Get url by token:
curl -i -X GET "https://graph.facebook.com/{your-user-id}/accounts?access_token={user-access-token}
See more here on facebook documentation : https://developers.facebook.com/docs/facebook-login/access-tokens/
Finall Word! you need to specify your app_id
or user_id
in url as I know
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