When you use jQuery.post(), the data is sent as regular $_POST arguments. So this JavaScript … var data = { action: ‘load_post’, foo: ‘bar’ }; … is available in your callback function per: $action = $_POST[‘action’]; $foo = $_POST[‘foo’]; // bar And when you are using jQuery.get(), the data is in $_GET. You can also … Read more
Don’t send AJAX to your PHP file directly. Instead, use WordPress’ built-in AJAX functions 1). You can register an AJAX callback from your plugin, and WordPress will route requests to your plugin file for you. For example, this code will register a callback called “wpa_49691”: add_action( ‘wp_ajax_wpa_49691’, ‘wpa_49691_callback’ ); add_action( ‘wp_ajax_nopriv_wpa_49691’, ‘wpa_49691_callback’ ); function wpa_49691_callback() … Read more
The errors I’ve spotted in your code: One was pointed by @helgatheviking in a comment: the Ajax callback has to be a public method, not private. Not sure how are you initializing this class, but wp_enqueue_script&_style (in singular) has to be encapsulated inside a wp_enqueue_scripts hook (WP_DEBUG dumps a notice). You can drop the & … Read more
You need to override the Backbone.sync function to change the URL used for the AJAX call. You can learn from the plugin wp-backbone does this and more. Below you can see from it how it changes all the actions into either POST or GET, create the parameters, add the action parameter and more. (function($) { … Read more
Yes finally the problem was that the hosting provider had blocked the admin-ajax.php file saying that this file was receiving too many request, and requests to this file bypasses cache , hence it was causing problems on server 🙂 So now i’ll have to ‘convince’ them to turn it back on. Thank you all for … Read more
Take a look at get_previous_post() and get_next_post() and you’ll see they both use the get_adjacent_post() to find the previous or next post. Let’s say you want to fetch the ID of the immediately previous post based on the current post’s ID. This is what you’d do: function get_previous_post_id( $post_id ) { // Get a global … Read more
TL;DR There is no JavaScript API in the WordPress core and no one is planned, but actually, there is no need of it. Backend First of all let’s say that, regarding the backend, some useful information can be fetched from already present JavaScript global variables (WordPress loves all global flavors). E.g. ajaxurl for the admin-ajax.php … Read more
Specifically AVOID using “hashbang” (“!#”) in order to make AJAX powered WordPress sites crawlable. You really don’t want to use the “hashbang” method on a WordPress site. The “!#” is more like a hacky patch for sites that cannot provide a static analog to it’s AJAX version. Its use in general is not recommended by … Read more
WP Ajax runs both public as well as closed calls via admin.php. This means that you don’t have access to the whole wp environment, such as do_shortcode(), which is inside /wp-includes/shortcodes.php. This still can get worked around (and as well for oEmbed). See the following example that you could use in your AJAX callback to … Read more
If you do not die, execution will continue and might generate extra output which might break whatever information you are trying to send from the server to the browser. Strictly speaking, you might not need to die, but there is very little point in taking the risk. In more general terms, WordPress Ajax shows its … Read more