Home Forums General Issues Required field based on input other fields Reply To: Required field based on input other fields

  • You can’t do what you are attempting to do to make the field required. the `$field[‘required’] setting is Boolean value and if it is an array then checking it returns true.

    Yes, conditional logic does not remove values from fields, it is up to us to check this condition in the template before we display the value of other fields, for example.

    if (get_field('description')) {
      // only show title when there is a description
      ?><h1><?php the_field('title'); ?></h1><?php 

    If you want to have one field required based on another field then you can do this using custom validation rules, for example:

    add_filter('acf/validate_value/key=field_deal1title', 'custom_validate_title', 20, 4);
    function custom_validate_title($valid, $value, $field, $input) {
      // title is required if field_deal1dealdiscount has a value
      if (!empty($_POST['acf']['field_deal1dealdiscount'])) {
        // the other field has a value
        // check value of this field
        if (empty($value)) {
          $valid = 'This field is required because you have added a value to some other field';
      return $valid;