api - Read For Learn

Dynamic URL, not a physical page within the database

add_rewrite_rule can help you sniff the request and let you handle it however you want. if( ! class_exists(‘PropertiesEndpoint’)): class PropertiesEndpoint { // WordPress hooks public function init() { add_filter(‘query_vars’, array($this, ‘add_query_vars’), 0); add_action(‘parse_request’, array($this, ‘sniff_requests’), 0); add_action(‘init’, array($this, ‘add_endpoint’), 0); } // Add public query vars public function add_query_vars($vars) { $vars[] = ‘__properties’; $vars[] = … Read more

Headless WordPress: How to authenticate front end requests?

The nonce authentication method is only for requests made from within WordPress, as described in your own link (emphasis mine): It is important to keep in mind that this authentication method relies on WordPress cookies. As a result this method is only applicable when the REST API is used inside of WordPress and the current … Read more

How to add a custom parameter to a WP API default route?

After a lot of digging I seem to have found a solution myself, and a pretty powerful one, which makes use of a rest_{ post_type }_query filter (replace the { post_type } part with the slug of your custom post type. You can use rest_post_query to alter the default /wp-json/wp/v2/posts request): public function __construct() { … Read more

How to create download links based on Custom Fields with Rewrite API

The first step in making this work is to register your custom query var for the file via the query_vars filter. I’ve named it wpa82328_file, but you can change this to something more meaningful to you. file is a bit generic though, so you’ll want to prefix it with something guaranteed to be unique: function … Read more

Basic WordPress AJAX Call

WordPress AJAX uses actions to connect your jQuery action with a traditional WordPress action. Take a look at the example WordPress provides in their docs. There’s 2 hooks: add_action( “wp_ajax_{$jquery_action_string}”, “callback_function_name” ); The above will only work for authenticated ( logged in ) users. For non-logged-in users we use nopriv: add_action( “wp_ajax_nopriv_{$jquery_action_string}”, “callback_function_name” ); So … Read more

Customizer JS API: Defining control settings

Settings must be registered in PHP one way or another. If you don’t register them statically via $wp_customize->add_setting() calls, you will have to register dynamic recognition of them via the customize_dynamic_setting_args filter. Why? In order for a setting to be safely stored it must be sanitized and validated by the server. Relying on client-side sanitization … Read more

AJAX request from Chrome Extension to WordPress Website

How do I create a widget that only allows a single instance?

I know this is a super old question, but searching for solutions 8 years later didn’t yield many results aside from this unresolved question (and a few other vague answers). Nothing I found on this site worked for me so if others arrive on this page looking for a way to limit a widget-area to … Read more

How to get all posts (in chunks) via XML-RPC?

According to topic in official forums [xmlrpc] How to get posts with offset? The existing XML-RPC APIs don’t really provide a way for collecting all of the post data right now. (Joseph Scott) Topic is somewhat old and I am not aware if there were some changes since, but from quick look at source it … Read more

Connect external web app to wordpress

There’s the XML RPC – the Remote Posting Protocol – that is already in use by WP.org Applications. What you’re searching for is wp.newPost. The API is extensible. The URL for the XML RPC is http://example.com/xmlrpc.php To send data to WP, use xmlrpc_encode_request() where the first argument would be wp.newPost and second one your arguments … Read more

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