1 <?php
 2 class myClass {
 3     public $item1 = 1;
 4     public $item2 = '中文';
 5     
 6     function to_json() {
 7         //url编码,避免json_encode将中文转为unicode
 8         $this->item2 = urlencode($this->item2);
 9         $str_json = json_encode($this);
10         //url解码,转完json后将各属性返回,确保对象属性不变
11         $this->item2 = urldecode($this->item2);
12         return urldecode($str_json);
13     }
14 }
15 
16 $c = new myClass();
17 echo json_encode($c);
18 echo '<br/>';
19 echo $c->to_json();
20 echo '<br/>';
21 echo json_encode($c);
22 echo '<br/>';
23 echo json_encode('胥');
24 ?>

{"item1":1,"item2":"\u4e2d\u6587"}
{"item1":1,"item2":"中文"}
{"item1":1,"item2":"\u4e2d\u6587"}
"\u80e5"