PHP json_encode

查看新版的PHP手册中JSON函数一节,JSON就增加了两个API,json_decode(),对一个json字符串进行解码,json_encode()是生成一个json字符串,我们就简单的测试一下。

构建如下PHP代码:

<?php 

//对象

class JsonTest{

var $id = 1;

var $name = 'heiyeluren';

var $gender = '男';

}

$obj = new JsonTest;

echo json_encode($obj)."<br /> ";

 

//数字索引数组

$arr1 = array(1, 'heiyeluren', '男');

echo json_encode($arr1)."<br /> ";

 

//关联索引数组

$arr2 = array("id"=>1, "name"=>'heiyeluren', "gender"=>'男');

echo json_encode($arr2)."<br /> ";

 

//多维数字索引数组

$arr3 = array(array(1, 'heiyeluren', '男'), array(1, 'heiyeluren', '男'));

echo json_encode($arr3)."<br /> ";

 

//关联索引数组

$arr4 = array(array("id"=>1, "name"=>'heiyeluren', "gender"=>'男'), array("id"=>1, "name"=>'heiyeluren', "gender"=>'男'));

echo json_encode($arr4)."<br /> ";

?>

 

浏览器输出:

{"id":1,"name":"heiyeluren","gender":""} 

[1,"heiyeluren",""]

{"id":1,"name":"heiyeluren","gender":""}

[[1,"heiyeluren",""],[1,"heiyeluren",""]]

[{"id":1,"name":"heiyeluren","gender":""},{"id":1,"name":"heiyeluren","gender":""}]

 

按照JSON格式定义,我们可以发现上面的几个特点:

1. 纯的数字索引是按照JavaScript能够识别的数组来存储的

2. 关联索引数组是按照JavaScript对象的形式来构造的

3. 多维关联索引是按照外围是JavaScript数组,中间的索引数组是对象

4. 无法识别中文,所有的中文字符串显示为空

  1. da shang
    donate-alipay
               donate-weixin weixinpay

发表评论↓↓