Guzzle oauth

callback.php

<?php
session_start();
require 'vendor/autoload.php';

use GuzzleHttp\Client;
use GuzzleHttp\Subscriber\Oauth\Oauth1;
use GuzzleHttp\Subscriber\Log\LogSubscriber;
use Monolog\Logger;
use Monolog\Handler\StreamHandler;
use GuzzleHttp\Subscriber\Log\Formatter;

date_default_timezone_set('America/Phoenix');

$authToken = $_GET['oauth_token'];
$authVerifier = $_GET['oauth_verifier'];

$log = new Logger('guzzle');
$log->pushHandler(new StreamHandler('guzzle.log'));

$client = new Client(['base_url' => 'https://api.twitter.com', 'defaults' => ['auth' => 'oauth']]);

$subscriber = new LogSubscriber($log, Formatter::SHORT);
$client->getEmitter()->attach($subscriber);

$oauth = new Oauth1([
    'consumer_key'    => '[your_api_key]',
    'consumer_secret' => '[your_api_secret]',
    'token' => $_SESSION['oauth_token']
]);

$client->getEmitter()->attach($oauth);

if ($authToken == $_SESSION['oauth_token'])
{
  $res = $client->post('oauth/access_token', ['body' => ['oauth_verifier' => $authVerifier]]);

  $params = (string)$res->getBody();

  parse_str($params);

  $_SESSION['oauth_token'] = $oauth_token;
  $_SESSION['oauth_token_secret'] = $oauth_token_secret;
  $_SESSION['userId'] = $user_id;
  $_SESSION['screenName'] = $screen_name;

  header("Location: timeline.php");
}

composer.json

{
    "name": "johndoe/guzzle-twitter",
    "description": "PoC for Sitepoint article",
    "authors": [
        {
            "name": "John Doe",
            "email": "john.doe@gmail.tst"
        }
    ],
    "minimum-stability": "dev",
    "require": {
        "guzzlehttp/guzzle": "4.*",
        "guzzlehttp/log-subscriber": "1.*",
        "monolog/monolog": "*",
        "guzzlehttp/oauth-subscriber": "*",
    }
}

index.php

<?php
session_start();
require 'vendor/autoload.php';

use GuzzleHttp\Client;
use GuzzleHttp\Subscriber\Oauth\Oauth1;
use GuzzleHttp\Subscriber\Log\LogSubscriber;
use Monolog\Logger;
use Monolog\Handler\StreamHandler;
use GuzzleHttp\Subscriber\Log\Formatter;

date_default_timezone_set('America/Phoenix');

$log = new Logger('guzzle');
$log->pushHandler(new StreamHandler('guzzle.log'));

$client = new Client(['base_url' => 'https://api.twitter.com', 'defaults' => ['auth' => 'oauth']]);

$subscriber = new LogSubscriber($log, Formatter::SHORT);
$client->getEmitter()->attach($subscriber);

$oauth = new Oauth1([
    'consumer_key'    => '[your_api_key]',
    'consumer_secret' => '[your_api_secret]'
]);

$client->getEmitter()->attach($oauth);

// Set the "auth" request option to "oauth" to sign using oauth
$res = $client->post('oauth/request_token', ['body' => ['oauth_callback' => 'http://[yourawesomehost]/callback.php']]);

$params = (string)$res->getBody();

parse_str($params);

$_SESSION['oauth_token'] = $oauth_token;
$_SESSION['oauth_token_secret'] = $oauth_token_secret;

header("Location: https://api.twitter.com/oauth/authenticate?oauth_token={$oauth_token}");

timeline.php

<?php
session_start();
require 'vendor/autoload.php';

use GuzzleHttp\Client;
use GuzzleHttp\Subscriber\Oauth\Oauth1;
use GuzzleHttp\Subscriber\Log\LogSubscriber;
use GuzzleHttp\Subscriber\Log\Formatter;
use Monolog\Logger;
use Monolog\Handler\StreamHandler;

date_default_timezone_set('America/Phoenix'); //Set to a proper timezone

/*
 * Setting up the logging backend, 
 */
$log = new Logger('guzzle');
$log->pushHandler(new StreamHandler('guzzle.log'));  // Log will be found at a file named guzzle.log
$subscriber = new LogSubscriber($log, Formatter::SHORT); //To see full details, you can use Formatter::DEBUG

/*
 * Creating the Guzzle client, we are setting oauth as the default authentication method
 */
$client = new Client(['base_url' => 'https://api.twitter.com', 'defaults' => ['auth' => 'oauth']]);

/*
 * Setting up the oauth subscriber parameters.  Parameter values 
 * have to be generated at the Twitter site
 */
$oauth = new Oauth1([
    'consumer_key'    => '[your_api_key]',
    'consumer_secret' => '[your_api_secret]',
    'token'           => $_SESSION['oauth_token'],
    'token_secret'    => $_SESSION['oauth_token_secret']
]);

/*
 * Attaching the oauth and the log subscriber to the client
 */
$client->getEmitter()->attach($oauth);

$client->getEmitter()->attach($subscriber);

/*
 * Executing a GET request on the timeline service, pass the result to the json parser
 */
$res = $client->get('1.1/statuses/home_timeline.json')->json();

echo '<pre>';

echo 'Timeline for user ' . $_SESSION['screenName'] . ':' . PHP_EOL . '<hr>';

foreach ($res as $tweet)
{
  echo 'From: ' . $tweet['user']['name'] . ' (@' . $tweet['user']['screen_name'] . ')' . PHP_EOL;
  echo '  ' . htmlentities($tweet['text']) . PHP_EOL .  '<hr>';
}