HTTP_OAuth is a PEAR package implementing the OAuth 1.0a protocol. Consumer, Provier (request and response) classes are provided. See the Consumer examples below:
Main consumer class that assists consumers in establishing OAuth creditials and making OAuth requests.
$consumer = new HTTP_OAuth_Consumer('key', 'secret');
$consumer->getRequestToken('http://example.com/oauth/request_token', $callback);
// Store tokens
$_SESSION['token'] = $consumer->getToken();
$_SESSION['token_secret'] = $consumer->getTokenSecret();
$url = $consumer->getAuthorizeUrl('http://example.com/oauth/authorize');
http_redirect($url); // function from pecl_http
// When they come back via the $callback url
$consumer = new HTTP_OAuth_Consumer('key', 'secret', $_SESSION['token'],
$_SESSION['token_secret']);
$consumer->getAccessToken('http://example.com/oauth/access_token');
// Store tokens
$_SESSION['token'] = $consumer->getToken();
$_SESSION['token_secret'] = $consumer->getTokenSecret();
// $response is an instance of HTTP_OAuth_Consumer_Response
$response = $consumer->sendRequest('http://example.com/oauth/protected_resource');