WordPress: add php to js with wp_localize_script

localize.php

/**
        * Move JS to Bottom of Footer
        * http://www.wpbeginner.com/wp-tutorials/how-to-move-javascripts-to-the-bottom-or-footer-in-wordpress/
*/

/*
    * Use wp_localize_script to load php into js
    * https://pippinsplugins.com/use-wp_localize_script-it-is-awesome/
 */


function ud_footer_js() {

    wp_enqueue_script('footer-script', plugins_url('include/www/modules/seal-blueheader-fluid/js/script.js'  , __FILE__ ),'','1.2',true);
    wp_localize_script('footer-script', 'pw_script_vars', array(
            // 'alert' => __('Hey! You have clicked the button!', 'pippin'),
            // 'message' => __('You have clicked the other button. Good job!', 'pippin')
            'sites_url' => __(esc_url( home_url( '/' ) ), 'Divi'),
            'ud_url' => __('http://gsa1.udel.edu/search', 'Divi')
        )
    );

}
add_action('wp_enqueue_scripts', 'ud_footer_js');