How to properly get onedrive access token via php and curl

Question

Am trying to get onedrive access token. Here is the Request:

GET https://login.microsoftonline.com/common/oauth2/v2.0/authorize?client_id={client_id}&scope={scope}
    &response_type=token&redirect_uri={redirect_uri}

Here is Response:

https://myapp.com/auth-redirect#access_token=EwC...EB
  &authentication_token=eyJ...3EM&token_type=bearer&expires_in=3600
  &scope=onedrive.readwrite&user_id=3626...1d

I have implemented the two code below in other to get the access token but am having error below when page is being redirected for login.

AADSTS900144: The request body must contain the following parameter: 'client_id'.

Scope property is space seperated hence see onedrive documentation link

code 1

$data_string = array(
"client_id" => "myclient id",
"response_type" => "token",
"redirect_uri" => "http://localhost/test/callback.php"
"scope" => ['files.readwrite', 'offline_access'],
); 
$data = json_encode($data_string); 
$curl = curl_init();

curl_setopt_array($curl, array( 
CURLOPT_URL => "https://login.microsoftonline.com/common/oauth2/v2.0/authorize?", 
CURLOPT_RETURNTRANSFER => true, 
CURLOPT_ENCODING => "", 
CURLOPT_MAXREDIRS => 10, 
CURLOPT_TIMEOUT => 30, 
CURLOPT_HTTP_VERSION => CURL_HTTP_VERSION_1_1, 
CURLOPT_CUSTOMREQUEST => "GET", 
CURLOPT_POSTFIELDS => "$data", 
));

$result = curl_exec($curl); 
$err = curl_error($curl);

curl_close($curl);

code 2

$curl = curl_init();
curl_setopt_array($curl, array( 
CURLOPT_URL => "https://login.microsoftonline.com/common/oauth2/v2.0/authorize?client_id=myclientid-goes-here&scope=files.readwrite.all offline_access
    &response_type=token&redirect_uri=http://localhost/test/callback.php", 
CURLOPT_RETURNTRANSFER => true, 
CURLOPT_ENCODING => "", 
CURLOPT_MAXREDIRS => 10, 
CURLOPT_TIMEOUT => 30, 
CURLOPT_HTTP_VERSION => CURL_HTTP_VERSION_1_1, 
CURLOPT_CUSTOMREQUEST => "GET", 
//CURLOPT_POSTFIELDS => "$data", 
));

$result = curl_exec($curl); 
$err = curl_error($curl);

curl_close($curl);

Answer 1

This was resolved using http_build_query() function hence

$data = http_build_query($data_string, '', '&');