false ); public static function value( $value, $default_value = null ) { if ( gettype($value) === 'string' ) { if ( $value != '' ) { $value = array_unique(array_filter(explode('|', $value))); } else { $value = array(); } } return self::compatibility( $value ); } protected static function outputValue( $value ) { // No need to decode return implode('|', $value); } function render() { ?>