Online PHP editor | output for 3DAsR

<?php interface solr_json_build { function to_json(); } class ror_service_recommend implements solr_json_build { //推荐页按产品分类和预订城市进行搜索 public $ids; public $bookCityCode; public $terminalType; public $queryFields; // 过滤价格为0线路 public $priceLimit = true; public function __construct(){} public function to_jsonnnn() { $json = array(); foreach (get_class_vars(__CLASS__) as $field => $value) { $this->{$field} && $json[$field] = $this->{$field}; } return json_encode($json); } } $o = new ror_service_recommend(); print_r($o);