wp_localize_script example

settings.php

/**
 * Enqueue the necessary CSS and JS that liveblog needs to function.
 *
 * @return If not a liveblog post
 */
public static function enqueue() {

    // Only add files files if post is a liveblog
    global $post;
    if ( ! is_singular() && false === strpos( $post->post_content, '[liveblog]' ) )
        return;

    //css
    wp_enqueue_style( self::key, plugins_url( '/css/liveblog.css', __FILE__ ), null, self::version );

    //js
    wp_enqueue_script( self::key, plugins_url( '/js/underscore-min.js', __FILE__ ), null, self::version, false );
    wp_enqueue_script( self::key, plugins_url( '/js/backbone-min.js', __FILE__ ), null, self::version, false );
    wp_enqueue_script( self::key, plugins_url( '/js/liveblog.js', __FILE__ ), null, self::version, false );

    wp_localize_script( self::key, 'liveblog_settings', 
        apply_filters( 'liveblog_settings', array( 
            'url'              => get_bloginfo( 'wpurl' ),
            'post_parent'      => get_the_id(),

            'latest_timestamp' => self::$entry_query->get_latest_timestamp(),
            'pages'            => self::$entry_query->get_page_count(),
            'live'             => get_post_meta( get_the_id(), '_liveblog_active', true ),

            'key'              => self::key,
            'nonce_key'        => self::nonce_key,

            'timeout'          => self::timeout,
        ) )
    );

}