Php+ajax+json

Here's an example: (json.html)

<HTMLLang= "en"><Head>    <MetaCharSet= "UTF-8">    <title>Document</title>    <Scriptsrc= "Js/jquery.js"></Script></Head><Body><inputtype= "button"value= "Submit"ID= "Submit"><DivID= "txt">&</Div><Script>//Listener Objectdocument.getElementById ('Submit'). onclick= function() {post ("json.php","name= Repetition Machine 1&age=123",function(data) {Console.log (data); },"JSON")}//a simple post packagefunctionPost (url,data,callback,datatype) {varXHR= NewXMLHttpRequest (); Xhr.onreadystatechange= function(){    if(Xhr.readystate== 4) {Callback (Json.parse (Xhr.responsetext)); }} xhr.open ("Post", URLs,true); Xhr.setrequestheader ("Content-type","application/x-www-form-urlencoded") xhr.send (data);}</Script></Body></HTML>

json.php

<? PHP $info Array ("Name" = "Repeater 2", "Age" =>223); $infoencode = Json_encode ($info); // convert to JSON format Echo $infoencode ;? >

If the php file is in gb2312 format, convert the value of the variable to utf-8 format, because the parameters of the Json_encode function must be utf-8:

 <? php   $info  = array  ("name" = "Repeater 2", "Age" = >223 foreach  ( $info  as   $name  = =  $value    $INFOGB  [" $name "] = iconv  (' gb2312 ', ' utf-8 ',  $value  );}   $infoencode  = Json_encode ( $INFOGB  ); echo   $infoencode  ; ? 

To summarize: The front-end back-end request sends data to the query string format, and the data to the front-end response is in JSON format for easy parsing with JavaScript.

Php+ajax+json