Require a minimum number of checked values
add_filter(‘frm_validate_field_entry’, ‘require_minimum_checkbox_number’, 10, 3); function require_minimum_checkbox_number( $errors, $field, $posted_value ){ if ( $field->id == 25 ) { $minimum = 4; if ( ! is_array ( $posted_value ) || ( is_array( $posted_value ) && count( $posted_value ) < $minimum ) )…Continue reading