WP Ajax Query

WP Ajax Query allows you to query your WordPress database using the same query paramaters you would use for WP_Query, and return a JSON respresentation of the query results. This allows developers to easily interface with WordPress without having to relearn a new API.

How It Works

The Ajax Query interface would be available at http://example.com/wp-admin/admin-ajax.php?action=query

A sample jQuery request would be like:
$.get(ajaxurl, { action: ‘query’ }, function () { }, ‘json’);

Querying for a post:
$.get(ajaxurl, { action: ‘query’, p: 1 }, function () { }, ‘json’);

JSON results:
{
“id”: 1,
“type”: ‘post’,
“title”: “Hello World”,
“permalink”: “http:\/\/example.com\/?p=1”
}

Query a category:
$.get(ajaxurl, { action: ‘query’, cat: 1 }, function () { }, ‘json’);

JSON results:
{
“id”: 1
“type”: “category”,
“permalink”: “http:\/\/example.com\/?cat=1”,
“terms”: [],
“posts”: []
}

terms and `posts` represents an array of either terms that are sub categories of the category, or posts belonging to the category.
Why I Created It

Needed a common way to query the database for posts and taxonomies across multiple plugins, and didn’t find a suitable replacement.

1. Upload the wp-ajax-query folder into your plugin directory.
2. Activate the plugin through the ‘Plugins’ menu in WordPress