+function wp_signon( $credentials = '' ) {
+ if ( empty($credentials) ) {
+ if ( ! empty($_POST['log']) )
+ $credentials['user_login'] = $_POST['log'];
+ if ( ! empty($_POST['pwd']) )
+ $credentials['user_password'] = $_POST['pwd'];
+ if ( ! empty($_POST['rememberme']) )
+ $credentials['remember'] = $_POST['rememberme'];
+ }
+
+ if ( !empty($credentials['user_login']) )
+ $credentials['user_login'] = sanitize_user($credentials['user_login']);
+ if ( !empty($credentials['user_password']) )
+ $credentials['user_password'] = trim($credentials['user_password']);
+ if ( !empty($credentials['remember']) )
+ $credentials['remember'] = true;
+ else
+ $credentials['remember'] = false;
+
+ do_action_ref_array('wp_authenticate', array(&$credentials['user_login'], &$credentials['user_password']));
+
+ // If no credential info provided, check cookie.
+ if ( empty($credentials['user_login']) && empty($credentials['user_password']) ) {
+ $user = wp_validate_auth_cookie();
+ if ( $user )
+ return new WP_User($user);
+
+ if ( !empty($_COOKIE[AUTH_COOKIE]) )
+ return new WP_Error('expired_session', __('Please log in again.'));
+
+ // If the cookie is not set, be silent.
+ return new WP_Error();
+ }
+
+ if ( empty($credentials['user_login']) || empty($credentials['user_password']) ) {
+ $error = new WP_Error();
+
+ if ( empty($credentials['user_login']) )
+ $error->add('empty_username', __('<strong>ERROR</strong>: The username field is empty.'));
+ if ( empty($credentials['user_password']) )
+ $error->add('empty_password', __('<strong>ERROR</strong>: The password field is empty.'));
+ return $error;
+ }
+
+ $user = wp_authenticate($credentials['user_login'], $credentials['user_password']);
+ if ( is_wp_error($user) )
+ return $user;
+
+ wp_set_auth_cookie($user->ID, $credentials['remember']);
+ do_action('wp_login', $credentials['user_login']);
+ return $user;
+}
+