piklist-filter-piklist_sanitization_rules-callback

<?php

  // create a sanitization rule called "my_email_sanitization"

  add_filter('piklist_sanitization_rules', 'sanitize_email_function', 11);
  function sanitize_email_function($sanitization_rules)
  {
    $sanitization_rules['my_email_sanitization'] = array(
      'callback' => 'sanitize_email_callback'
    );
   
    return $sanitization_rules;
  }
   
  function sanitize_email_callback($value, $field, $options)
  {   
    return sanitize_email($value); // sanitize_email() is a core WordPress function
  }