php操作JSON格式数据的实现代码

时间:2022-09-01 19:55:45

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" } 
  ] } 


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@zzvips.com', 
'website' =>'//www.zzvips.com', 

); 
//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":"\u975e\u8bda","lastname":"\u52ff\u6270","contact":{"email":"fcwr@zzvips.com","website":"http:\/\/www.zzvips.com"}} 
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@zzvips.com', 
'website' =>'//www.zzvips.com', 

); 
//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@zzvips.com [website] => //www.zzvips.com ) )