Examples of ajax cross-origin method in jquery _ jquery

This article mainly introduces the ajax cross-origin method in jquery, and analyzes the usage of getJSON and $ in jQuery with examples. ajax cross-origin implementation skills. if you need ajax cross-origin skills, refer to the examples in this article to analyze ajax cross-origin in jquery. We will share this with you for your reference. The details are as follows:

JSONP is an unofficial protocol that allows the server to integrate Script tags to return to the client and implement cross-origin access through javascript callback.

Method 1: getJSON of jsonp

Js

var url = "http://localhost/mytest/jsonp_php.php?callback=?";$.getJSON(url, {  "age": 21,  "name": "kitty"}, function (data) {  alert("name:" + data.name + ", age:" + data.age);});

Php

<?php   $age=$_GET["age"];  $name=$_GET["name"];  $jsondata = "{age:$age, name:'$name'}";  echo $_GET['callback'].'('.$jsondata.')';?>

Jsonp $. ajax

Js

$.ajax({  type: 'GET',  url: 'http://localhost/mytest/jsonp_php.php',  dataType: "jsonp",  jsonp: "callback5",  jsonpCallback:"flightHandler",  data: {    "age": 21,    "name": "kitty"  },  success: function (data) {    alert("name:" + data.sd + ", age:" + data.aa)  }})

Php

<?php  $age=$_GET["age"];  $name=$_GET["name"];  $ary=array("sd"=>"sdfg","aa"=>23);   $jsondata=json_encode($ary);  echo $_GET['callback5'].'('.$jsondata.')';?>

I hope this article will help you with jQuery programming.