Pippin’s Login Shortcode

// Creates Login Shortcode
// Shortcode Usage: [loginform redirect="http://my-redirect-url.com"]

function pippin_login_form_shortcode( $atts, $content = null ) {
 
	extract( shortcode_atts( array(
      'redirect' => ''
      ), $atts ) );
 
	if (!is_user_logged_in()) {
		if($redirect) {
			$redirect_url = $redirect;
		} else {
			$redirect_url = get_permalink();
		}
		$form = wp_login_form(array('echo' => false, 'redirect' => $redirect_url ));
	} 
	return $form;
}
add_shortcode('loginform', 'pippin_login_form_shortcode');