php操作JSON格式数据的实现代码
author:一佰互联 2019-04-30   click:162
知识点:
1、JSON数据格式介绍
2、对数据编码成JSON格式
3、对JSON数据进行解码,并操作
JSON数据格式表示方式如下:
复制代码 代码如下:
{ "programmers": [
  { "firstName": "Brett", "lastName":"McLaughlin", "email": "aaaa" },
  { "firstName": "Jason", "lastName":"Hunter", "email": "bbbb" },
  { "firstName": "Elliotte", "lastName":"Harold", "email": "cccc" }
  ],
  "authors": [
  { "firstName": "Isaac", "lastName": "Asimov", "genre": "science fiction" },
  { "firstName": "Tad", "lastName": "Williams", "genre": "fantasy" },
  { "firstName": "Frank", "lastName": "Peretti", "genre": "christian fiction" }
  ],
  "musicians": [
  { "firstName": "Eric", "lastName": "Clapton", "instrument": "guitar" },
  { "firstName": "Sergei", "lastName": "Rachmaninoff", "instrument": "piano" }
  ] }

用php将数据编码成JSON格式:
复制代码 代码如下:
<?php
//php中用数组表示JSON格式数据
$arr = array(
"firstname" => iconv("gb2312", "utf-8", "非诚"),
"lastname" => iconv("gb2312", "utf-8", "勿扰"),
"contact" => array(
"email" =>"fcwr@jb51.net",
"website" =>"//www.yinxi.net",
)
);
//将数组编码成JSON数据格式
$json_string = json_encode($arr);
//JSON格式数据可直接输出
echo $json_string;
?>

需要指出的是,在非UTF-8编码下,中文字符将不可被encode,结果会出来空值,所以,如果你使用 gb2312编写PHP代码,那么就需要将包含中文的内容使用iconv或者mb转为UTF-8再进行json_encode。
输出:(JSON格式)
{"firstname":"u975eu8bda","lastname":"u52ffu6270","contact":{"email":"fcwr@jb51.net","website":"http://www.yinxi.net"}}
用php对JSON数据进行解码并处理:
复制代码 代码如下:
<?php
//php中用数组表示JSON格式数据
$arr = array(
"firstname" => iconv("gb2312", "utf-8", "非诚"),
"lastname" => iconv("gb2312", "utf-8", "勿扰"),
"contact" => array(
"email" =>"fcwr@jb51.net",
"website" =>"//www.yinxi.net",
)
);
//将数组编码成JSON数据格式
$json_string = json_encode($arr);
//将JSON格式数据进行解码,解码后不是JSON数据格式,不可用echo直接输出
$obj = json_decode($json_string);
//强制转化为数组格式
$arr = (array) $obj;
//按数组方式调用里面的数据
echo iconv("utf-8","gb2312",$arr["firstname"]);
echo "</br>";
//输出数组结构
print_r($arr);
?>

输出:
非诚
Array ( [firstname] => 闈炶瘹 [lastname] => 鍕挎壈 [contact] => stdClass Object ( [email] => fcwr@jb51.net [website] => //www.yinxi.net ) )