How to properly get onedrive access token via php and curl - php

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, '', '&');