PHP class encapsulation is relatively difficult for beginners to understand. This article mainly introduces relevant information about the implementation of communication data encapsulation classes of PHP common operation classes. The article introduces it in detail through example code, which is very useful for everyone. It has certain reference and learning value, and I hope it can help everyone.

Necessity

Whether it is in the B/S architecture or the C/S architecture, the data communication at both ends (note: the communication here refers to the network request and reply operations ) are inevitable, because without data, there is no content, and without content, what’s the point:)

Generally speaking, the C/S architecture communication execution process is as follows:

The B/S architecture communication execution process is like this:

Choose

Since data communication is inevitable , then which communication method should be better? At present, there are three main ways of data transmission and interaction between the server and the client: URL, XML, and JSON.

The URL method is the most commonly used and direct. It is usually used for the GET method. In fact, I think the Form form in POST is actually the URL method. However, this transmission method has limited data and is not standardized. It is only suitable for Some simple scenes. XML and JSON are essentially descriptions of data. The purpose is to segment, package, standardize and other processing of complex data to facilitate data transmission and analysis. Relatively speaking, JSON is lighter but more flexible and powerful than XML. For example Example: Use the above two methods to express my personal information as follows:

?JSON:
?{"name":"entner","age":21,"gender":"男"}
?
?XML:
?<ROOT>
??<name>entner</name>
??<age>21</age>
??<gender>男</gender>
?</ROOT>

Interested readers can refer to the reference link below, which is very detailed.

How to encapsulate?

As mentioned above, XML and JSON are currently the mainstream communication data formats. Let’s talk about how to encapsulate them for easy use.

Assume that we operate the database server in the background to obtain array data. To convert the array to Json, we only need the json_encode function. It will automatically detect recursion. For the array to XML, we need to strictly follow the format. See the code for details. and comments.

Source Code

<?php
/**
 * TODO:Json格式數(shù)據(jù)通信
 * Author：entner
 * time: 2017-5-8
 * version:1.0
 * ready:
  狀態(tài)碼 ：int $code
  提示消息：string $message
  消息內(nèi)容：array $data
  數(shù)組包裝：array $result
  

 function： 
  show   封裝多種通信數(shù)據(jù)格式
  jsonEncode 封裝Json格式通信數(shù)據(jù)
  xmlToJson 封裝xml格式通信數(shù)據(jù)
  xmlEncode  遞歸調(diào)用xmlToJson

 */
Class Json{

 const JSON = "json";

/**
  *按綜合方式輸出通信數(shù)據(jù)
  *@param inter code 狀態(tài)碼
  *@param char message 消息提示
  *@param array data 通信數(shù)據(jù)
  *@param string type 數(shù)據(jù)類型
  *return string
 */ 

 public function show($code,$message,$data=array(),$type = self::JSON){
  /* 檢查狀態(tài)碼是否合法 */
  if(!is_numeric($code)){
   exit();
  }

  $result = array(
   &#39;code&#39;=>$code,
???'message'=>$message,
???'data'=>$data
???);

??/*?由客戶端傳遞參數(shù)決定封裝數(shù)據(jù)的格式，默認(rèn)Json格式?*/
??$type?=?isset($_GET['format'])??$_GET['format']:self::JSON;

??if($type?==?'xml'){
???$this->xmlEnCode($code,$message,$data);
???exit;?//一次不允許并發(fā)多種格式，所以沒必要執(zhí)行下面的判斷
??}else?if($type?==?'json'){
???$this->jsonEncode($code,$message,$data);
???exit?;
??}else?if($type?==?'array'){
???var_dump($result);
???exit;
??}else{
???//?客戶端傳來的數(shù)據(jù)格式為?http/ftp/
??}

?}


/**
??*輸出Json格式通信數(shù)據(jù)
??*@param?inter?code?狀態(tài)碼
??*@param?char?message?消息提示
??*@param?array?data?通信數(shù)據(jù)
??*return?string
?*/?
?public?function?jsonEnCode($code,$message,$data=array()){
??if(!is_numeric($code)){
???exit();
??}
??$result?=?array(
???'code'=>$code,
???'message'=>$message,
???'data'=>$data
???);
??echo?json_encode($result);?//json_encode會自動遞歸轉(zhuǎn)換數(shù)組變量
??return?true;
?}

?/**
??*輸出XML格式通信數(shù)據(jù)
??*@param?inter?code?狀態(tài)碼
??*@param?char?message?消息提示
??*@param?array?data?通信數(shù)據(jù)
??*return?string
?*/?
?public?function?xmlEnCode($code,$message,$data=array()){
??if(!is_numeric($code)){
???exit();
??}
??$result?=?array(
???'code'=>$code,
???'message'=>$message,
???'data'=>$data
???);

??/*?拼接xml格式數(shù)據(jù)?*/
??
??
??/*?這里一定要注意聲明頭部信息和XML聲明?*/
??header("Content-type:text/xml");
??$xml?=?"<?xml version = &#39;1.0&#39; encoding = &#39;UTF-8&#39;?>\n";
??$xml?.=?"<root>\n";???/*??XML標(biāo)簽其實(shí)也是字符串，所以要用?.?連接運(yùn)算符??*/
??$xml?.=?self::xmlToJson($result);?/*?調(diào)用xmlToJson函數(shù)解析數(shù)組轉(zhuǎn)換為節(jié)點(diǎn)?*/??
??$xml?.=?"</root>";
??echo?$xml;??
?}

?/**
??*遞歸拼接XML數(shù)據(jù)
??*@param?inter?code?狀態(tài)碼
??*@param?char?message?消息提示
??*@param?array?data?通信數(shù)據(jù)
??*return?string
?*/?
?public?static?function?xmlToJson($data){
??$xml?=?$attr?=?"";
??foreach($data?as?$k?=>?$v){

???/*XML不允許出現(xiàn)數(shù)字標(biāo)簽，所以要么獎數(shù)字轉(zhuǎn)化為字母，要么混合拼接，這里采用很合拼接的方式?*/
???if(is_numeric($k)){
????$attr?=?"?id?=?'{$k}'?";
????$k?=?"item";
????$xml?.="<{$k}{$attr}>\n";
????/*?因?yàn)閿?shù)組內(nèi)部可能還存在數(shù)組，所以需要自行遞歸檢查一遍，注意，在每次遞歸的時候，都要連接在$xml尾部，并換行?*/
????$xml?.=is_array($v)?self::xmlToJson($v):$v;
????$xml?.="</{$k}>\n";
???}else{
????$xml?.="<{$k}>\n";
????$xml?.=is_array($v)?self::xmlToJson($v):$v;
????$xml?.="</{$k}>\n";
???}
???
??}
??return?$xml;
?}

}

$data?=?array(
?
?'name'=>'entner',
?'type'=>array(
???0=>'a',
???1=>'b'
??)
?);
$try?=?new?Json();
$try->xmlEnCode(200,'success',$data);

Related recommendations:

Detailed explanation of the communication data encapsulation class in PHP

How to implement operation class (communication data encapsulation class) in php?

Used to analyze, monitor and transform communication data MySQL-Proxy(1)[Figure]_MySQL

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