WPForms: new smart tag – Current Date/Time

// Register the smart tag.

add_filter( 'wpforms_smart_tags', static function( $tags ) {

	// Key is the tag, value is the tag name.

	$tags['current_time'] = 'Current Date/Time';

	return $tags;

} );

// Replace its value on form render on front-end.

add_filter( 'wpforms_process_smart_tags', static function( $field_val, $form_data ) {

	return str_replace( '{current_time}', date_i18n( 'Y-m-d H:i:s' ), $field_val );

}, 10, 2 );