GetRefreshToken.php

<?php

require_once __DIR__ . '/vendor/autoload.php';

use Google\Auth\CredentialsLoader;
use Google\Auth\OAuth2;

/**
 * Command line example that prompts you for the required OAuth2 credentials
 * to generate an offline refresh token for installed application flows.
 *
 * <p>You can then use this refresh token to generate access tokens to
 * authenticate against the ads API(s) you're using.
 */
class GetRefreshToken {

	/**
	 * @var string the OAuth2 scope for the AdWords API
	 * @see https://developers.google.com/adwords/api/docs/guides/authentication#scope
	 */
	const ADWORDS_API_SCOPE = 'https://www.googleapis.com/auth/adwords';

	/**
	 * @var string the OAuth2 scope for the GAM API
	 * @see https://developers.google.com/doubleclick-publishers/docs/authentication#scope
	 */
	const GAM_API_SCOPE = 'https://www.googleapis.com/auth/dfp';

	/**
	 * @var string the Google OAuth2 authorization URI for OAuth2 requests
	 * @see https://developers.google.com/identity/protocols/OAuth2InstalledApp#formingtheurl
	 */
	const AUTHORIZATION_URI = 'https://accounts.google.com/o/oauth2/v2/auth';

	/**
	 * @var string the redirect URI for OAuth2 installed application flows
	 * @see https://developers.google.com/identity/protocols/OAuth2InstalledApp#formingtheurl
	 */
	const REDIRECT_URI = 'urn:ietf:wg:oauth:2.0:oob';

	public static function main() {
		$PRODUCTS = [
			['AdWords', self::ADWORDS_API_SCOPE],
			['GAM', self::GAM_API_SCOPE],
			['AdWords and GAM', self::ADWORDS_API_SCOPE . ' ' . self::GAM_API_SCOPE]
		];

		$stdin = fopen('php://stdin', 'r');

		print 'Enter your OAuth2 client ID here: ';
		$clientId = trim(fgets($stdin));

		print 'Enter your OAuth2 client secret here: ';
		$clientSecret = trim(fgets($stdin));

		print "Select the ads API you're using: [0] AdWords [1] GAM [2] Both\n";
		$api = trim(fgets($stdin));

		while (!is_numeric($api) ||
			!(strval(intval($api)) === $api) ||
			!(intval($api) >= 0 && intval($api) <= 2)
		      ) {
			print "Please enter a valid number for the ads API you're using: [0] AdWords [1] GAM [2] Both\n";
			$api = trim(fgets($stdin));
		}

		$api = intval($api);

		if ($api === 2) {
			print '[OPTIONAL] enter any additional OAuth2 scopes as a space ' .
				'delimited string here (the AdWords and GAM scopes are already included): ';
		} else {
			printf(
				'[OPTIONAL] enter any additional OAuth2 scopes as a space delimited string here (the %s scope is already included): ',
				$PRODUCTS[$api][0]
			);
		}

		$scopes = $PRODUCTS[$api][1] . ' ' . trim(fgets($stdin));

		$oauth2 = new OAuth2([
			'authorizationUri' => self::AUTHORIZATION_URI,
			'redirectUri' => self::REDIRECT_URI,
			'tokenCredentialUri' => CredentialsLoader::TOKEN_CREDENTIAL_URI,
			'clientId' => $clientId,
			'clientSecret' => $clientSecret,
			'scope' => $scopes
		]);

		printf(
			"Log into the Google account you use for %s and visit the following URL:\n%s\n\n",
			$PRODUCTS[$api][0],
			$oauth2->buildFullAuthorizationUri()
		);
		print 'After approving the application, enter the authorization code here: ';
		$code = trim(fgets($stdin));
		fclose($stdin);
		print "\n";

		$oauth2->setCode($code);
		$authToken = $oauth2->fetchAuthToken();

		printf("Your refresh token is: %s\n\n", $authToken['refresh_token']);
		printf(
			"Copy the following lines to your 'adsapi_php.ini' file:\n" .
			"clientId = \"%s\"\n" .
			"clientSecret = \"%s\"\n" .
			"refreshToken = \"%s\"\n",
			$clientId,
			$clientSecret,
			$authToken['refresh_token']
		);
	}
}

GetRefreshToken::main();