Handle Post request with Wordpress

Question

I have some custom code and I am not sure how to catch that Post request.

<?php $nonce = wp_create_nonce('nrc_update_certifications_nonce');?>
<?php $link = admin_url('admin-ajax.php?action=nrc_update_certifications&nonce=' . $nonce); ?>
<file-upload
    extensions="jpg,jpeg,png,pdf"
    :accept="accept"
    :multiple="true"
    post-action="<?php echo $link;?>"
    :data="{
        types: accept,
        certifications_ids: certifications_ids,
    }"
    v-model="certifications"
    name="certifications[]"
    @input-filter="inputFilter"
    ref="upload">
    <span class="button">Select files</span>
</file-upload>

In my child theme I have a file update-certifications.php. This file is imported in functions.php

  function nrc_update_certifications() {
    // I don't get here!
    if ( !wp_verify_nonce( $_REQUEST['nonce'], "nrc_update_certifications_nonce")) {
      exit("No naughty business please");
    }  
    exit ("Works!");
  }
  add_action('wp_ajax_update_certifications', 'nrc_update_certifications');

Answer 1

The correct way to do that is the following:

function nrc_update_certifications() {
    // I don't get here!
    if ( !wp_verify_nonce( $_REQUEST['nonce'], "nrc_update_certifications_nonce")) {
      exit("No naughty business please");
    }  
    exit ("Works!");
  }
  add_action('wp_ajax_nrc_update_certifications', 'nrc_update_certifications');

What changes is that when you do add_action the action starts with "wp_ajax_" and it MUST be followed by what you specify in the action parameter of your call. Since you build the link like this:

<?php $link = admin_url('admin-ajax.php?action=nrc_update_certifications&nonce=' . $nonce); ?>

Then the missing part after wp_ajax_ must be "nrc_update_certifications". What you are free to change is the function specified as the second parameter of add_action

Sidenote: if you want that ajax to be available for non-logged user aswell, then you are missing another call to add action which should be:

add_action( 'wp_ajax_nopriv_nrc_update_certifications', 'nrc_update_certifications' );

See the "nopriv" part of the action. If you want to know more i suggest you to take a look at this: https://codex.wordpress.org/AJAX_in_Plugins