WordPress helper for detecting if the current page is the login page

gistfile1.php

<?php

/**
 * Is Login Page
 *
 * Detects if the current request is from the login page.
 *
 * Credit: http://stackoverflow.com/questions/5266945/wordpress-how-detect-if-current-page-is-the-login-page#5892694
 */
function isLoginPage()
{
    return in_array($GLOBALS['pagenow'], array('wp-login.php', 'wp-register.php'));
}