callbacks - Read For Learn

How To Override A WooCommerce AJAX Function

Ok, so I don’t know if this is the best way, but it’s working for now. Within my OOP class (I have a custom plugin to override a WC plugin): remove_action( ‘wp_ajax_wc_function’, array( WC_Parent_Class, ‘wc_do_stuff’ ) ); remove_action( ‘wp_ajax_nopriv_wc_function’, array( WC_Parent_Class, ‘wc_do_stuff’ ) ); add_action( ‘wp_ajax_wc_function’, array( __CLASS__, ‘my_override_do_stuff’ ) ); add_action( ‘wp_ajax_nopriv_wc_function’, array( __CLASS__, … Read more

admin_notices action doesn’t trigger within save_post action

You need to send your notice message – or probably a key that refers to a specific standard notice message – over the URL to the next page. I’d advise encapsulating this in its own function. Something like… public function render_to_pdf() { // … whatever you need to do my_trigger_notice( 1 ); // 1 here … Read more

Replacement for gallery_shortcode function not taking all attributes

<?php function modified_post_gallery( $blank = NULL, $attr ) { echo ‘<pre>’; print_r( $attr ); echo ‘</pre>’; } add_filter( ‘post_gallery’, ‘modified_post_gallery’, 10, 2); ?> In media.php it shows the filter like this: // Allow plugins/themes to override the default gallery template. $output = apply_filters(‘post_gallery’, ”, $attr); Its passing two variables not one and $attr is on … Read more

url – ajax loaded but no JS

Try this code in your complete callback of the load function: $(“.postbox_wrapper”).load( jQuery(this).attr(“href”) + ” .postbox_wrapper”, function(response, status, xhr) { // complete callback // create a empty div var div = document.createElement(‘div’); // fill div with response div.innerHTML = response; // take correct part of the response var ref = $($(div).find(‘.postbox_wrapper’).html()); // filter response for … Read more

How to return hook data when multiple parameters are present?

You can only return one chunk of data from a function. That is a PHP enforced rule. If you need to return multiple pieces of data you need to return an array or an object. With filters, though, you can’t just decide what to return. You have to return what the filter is meant to … Read more

How to return multiple arguments from AJAX callback function

Have you tried returning an array instead? wp_send_json($an_array_of_your_vals); And then parse the array in the success function? success: function( data ) { var obj = jQuery.parseJSON(data); if( obj.arg_1 ) { $(‘selector’).append( obj.content ); } else if( obj.arg_2 ) { $(‘other_selector’).append( obj.content ); } }

Website Warning: call_user_func_array() expects parameter 1 to be a valid callback, class ‘Wppr_Public’ does not have a method ‘amp_support’

The warning message is pretty clear. You’re passing method amp_support from class Wppr_Public as callback, but this class doesn;t have such method… So how to fix it? You should find that class and look for this function. Maybe it’s some typo or that method changed its name or moved to another class or something like … Read more

call_user_func_array expects parameter 1 to be a valid callback

This means you have a function named wp_my_admin_enqueue_scripts hooked to an action, either in your theme or a plugin, but that function name is not available to WordPress for some reason. When that action fires, any functions “hooked” to it are executed by WordPress. If one of the hooked functions is not available, this is … Read more

Run function after a post has finished saving – callback function perhaps?

If you don’t have control over the API, you’re doing it almost right. That is what cron jobs are for. What needs to be avoided is possible overlapping API calls that do the same thing. Why not instead have a meta field automation_operation_status that stores the … status? Like pending, running, complete, error. Then, in … Read more

Filter an array with a callback – for single & multidimensional arrays

While your answer is very interesting and I like it, I still want to post another proposal, just let you have another choice 🙂 IMHO, if the data contains only simple fields, like: array( ‘name’ => ‘my name’, ‘address’ => ‘my address’, ‘phone’ => ‘01234’, ); then you can use the code below: add_filter( ‘wpse63692_example_filter’, … Read more

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