在php页面中要包含哪些内容以使用wordpress的功能？

Question

I have a wordpress website and I want to create a page that also has javascript and upon a certain user action the javascript calls the server with an AJAX request. This is a GET request to a php script I created. Since I extended wordpress with my plugin I put this php in my plugin's folder.

The problem is that from this php script I want to access everything that wordpress offers, eg the database access, but I do not know how.

What do I have to include in this php file in order to access the functions offered by wordpress? I wanted to use database access so I included the wp-db.php file and declared the global wpdb variable, but it did not help.

Can anyone tell me how to accomplish this?

Thanks in advance!

Answer 1

Wordpress has it's own build in ajax: http://codex.wordpress.org/AJAX_in_Plugins
Use this instead of your own ajax script.

In this ajax script you can use all WP functions. It will also make your plugin more like wordpress standards.

Answer 2

As recommended in he WordPress Codex itself.

<?php 
/* Short and sweet */
define('WP_USE_THEMES', false);
require('./wp-blog-header.php');
?>

By using the blog header no database queries are executed by default, you have to supply the get_posts that will fetch what-ever articles you need based on your application's parameters:

<?php $posts = get_posts('numberposts=10&order=ASC&orderby=post_title'); ?>
<?php foreach ($posts as $post) : start_wp(); ?>
    <?php the_date(); echo "<br />"; ?>
    <?php the_title(); ?>    
    <?php the_excerpt(); ?> 
<?php endforeach; ?>