Reply To: Frontend Custom Validation for acf_form

• John Huebner

• July 21, 2023 at 1:01 pm

I just did a test and everything is working as expected using this code

add_filter('acf/validate_value/key=field_64ba92e423e65', 'validate_email_field', 20, 4);
function validate_email_field( $valid, $value, $field, $input ) {
  if (!$valid) {
    return $valid;
  }
  if( email_exists( $value ) ) {
    $valid = 'email exists';
  }
   return $valid;
}

You must have something else that is interfering, as I said in my original response, something that is breaking the ajax response. Either another plugin or some code in the theme.