【PHP】Twitter Oauth2.0を利用したログインがうまくいかない

PHPでTwitter Oauth2.0を利用したログインの実装で、「Authorize app」クリック後、callback URLに遷移すると下記のようなエラーが出ます。

{"error":"invalid_request","error_description":"Missing required parameter [grant_type]."}int(1)

ソースコードは下記です。どのようにすればうまくいくか、わかる方いたら教えていただけると助かります。

PHP
1<?php
2  session_start();
3
4  define('Consumer_Key', '<Consumer Key>');
5  define('Consumer_Secret', 'Consumer Secret');
6  define('Callback', 'http://127.0.0.1:3000/callback.php');
7  define('Client_id', 'Client ID');
8
9  $base_url = 'https://twitter.com/i/oauth2/authorize';
10
11  $query = [
12    'response_type' => 'code',
13    'client_id' => Client_id,
14    'redirect_uri' => Callback,
15    'scope' => 'tweet.read users.read offline.access',
16    'state' => 'state',
17    'code_challenge' => 'codeChallenge',
18    'code_challenge_method' => 'S256'
19  ];
20
21  $url = $base_url . '?' . http_build_query($query);
22
23  header('Location: ' . $url);
24
25?>
26

callback.php

PHP
1<?php
2  session_start();
3
4  define('Consumer_Key', 'Consumer Key');
5  define('Consumer_Secret', 'Consumer Secret');
6  define('Callback', 'http://127.0.0.1:3000/callback.php');
7  define('Client_id', 'Client ID');
8  define('Client_Secret', 'Client Secret');
9
10  $base_url = 'https://api.twitter.com/2/oauth2/token';
11  $user_creds = Consumer_Key.':'.Consumer_Secret;
12  $client = Client_id.':'.Client_Secret;
13  $authorization_code = $_GET['code'];
14
15   $header = array(
16    "Authorization: Basic " . $client,
17    "Content-Type: application/x-ww-form-urlencoded",
18  );
19
20  $data = array(
21    "grant_type" => "client_credentials",
22    "client_id" => Client_id,
23    "client_secret" => Client_Secret,
24    "code" => $authorization_code,
25    "redirect_uri" => Callback,
26    "code_verifier" => "challenge",
27  );
28
29  $curl = curl_init();
30
31  curl_setopt($curl, CURLOPT_URL, $base_url);
32  curl_setopt($curl, CURLOPT_HTTPHEADER, $header);
33  curl_setopt($curl, CURLOPT_POSTFIELDS, http_build_query($data));
34
35  $response = curl_exec($curl);
36  $result = json_decode($response, true);
37
38  curl_close($curl);
39
40  var_dump($result);
41
42?>
43

●参考にしていたURL
https://zenn.dev/kg0r0/articles/8b1cfe654a1cee
https://developer.twitter.com/en/docs/authentication/oauth-2-0/authorization-code

行動規範の内容に同意します

回答1件

PHP v7.4.18の環境で以下のコードでアクセストークンとリフレッシュトークンを取得できました

PHP
1            $code = htmlspecialchars($_GET["code"]);
2            $client_id = config('twitterToken.client_id');
3            $client_secret = config('twitterToken.client_secret');
4
5            $client_key = rawurldecode($client_id);
6            $client_secret = rawurldecode($client_secret);
7
8            $base64_key = base64_encode($client_key.':'.$client_secret);
9
10            $url = 'https://api.twitter.com/2/oauth2/token?code='.$code.'&grant_type=authorization_code&client_id='.$client_id.'&redirect_uri=http://127.0.0.1:8000/OAuthCallback&code_verifier=challenge';
11
12            $curl = curl_init();
13            curl_setopt_array($curl, array(
14                CURLOPT_URL => $url,
15                CURLOPT_RETURNTRANSFER => true,
16                CURLOPT_CUSTOMREQUEST => "POST",
17                CURLOPT_HTTPHEADER => array(
18                    "authorization: Basic ".$base64_key,
19                    "cache-control: no-cache",
20                    "content-type: application/x-www-form-urlencoded"
21                ),
22            ));
23
24            $tokenResponse = curl_exec($curl);
25            $err = curl_error($curl);
26
27            curl_close($curl);
28