InvalidAuthenticationToken and CompactToken issues - Microsoft Graph using PHP Curl

Question

I\'m able to successfully fetch an access_token from having the user login via oauth (parameter: code) etc. However, each time I attempt to post the authorization header (via ph

Answer 1

This error is apparently due to sending the OAuth token as OAuth instead of Bearer in the curl request.

This triggered the above error:

curl_setopt($ch, CURLOPT_HTTPHEADER, array(                                                                          
    'Content-Type: application/json',                                                                                
    'Content-Length: 0',
    'Authorization: OAuth '.$token)                                                                       
);        

This yielded the successful response:

curl_setopt($ch, CURLOPT_HTTPHEADER, array(                                                                          
    'Content-Type: application/json',                                                                                
    'Content-Length: 0',
    'Authorization: Bearer '.$token)                                                                       
);