Filter/Sort Post Form On Taxonomy page

That happens because wp_dropdown_categories, by default, defines the name of the dropdowns as ‘cat’. You are showing 2 dropdowns in the form, and both are named ‘cat’, because you didn’t define a name for them. So when you submit the form, you get two query vars named cat. For example, if you want the second … Read more

Custom form validation

Yes, you’d use a JSON response containing an error property. <?php echo json_encode( [ ‘error’ => [ ‘code’ => ‘my_error_code’, ‘message’ => ‘My error message.’, ‘data’ => [any additional data you need], ], ] ); Your AJAX callback should look for the error and adapt accordingly. For the regular POST, you’d want to generate HTML … Read more

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