Use simple records with jsonp (1)
Principle:
The introduced js can be from different domains, and the js file can be generated from the background
(What is said here is a bit simple, please go there more Find information)
Use DEMO:
html：
//原生js
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<title></title>
<script type="text/javascript">
// 得到航班信息查询结果后的回调函数
var returnjs = function(data){
alert(data.code);
};
// 提供jsonp服务的url地址（不管是什么类型的地址，最终生成的返回值都是一段javascript代码）
var url = "http://www.return.com/jsonp/get?code=1&callback=returnjs";//数据接收后台
// 创建script标签，设置其属性
var script = document.createElement('script');
script.setAttribute('src', url);
// 把script标签加入head，此时调用开始
document.getElementsByTagName('head')[0].appendChild(script);
</script>
</head>
<body>
</body>
</html>//jQ版
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>Insert title here1</title>
<script type="text/javascript" src="jq.js"></script><!-- 记得引入jq -->
</head>
<body>
<script type="text/javascript">
jQuery(document).ready(function(){
$.ajax({
type: "get",
async: false,
url: "http://www.return.com/jsonp/get?code=1",//数据接收后台
dataType: "jsonp",
jsonp: "callback",//传递给请求处理程序或页面的，用以获得jsonp回调函数名的参数名(一般默认为:callback)
jsonpCallback:"returnjs",//自定义的jsonp回调函数名称，默认为jQuery自动生成的随机函数名，也可以写"?"，jQuery会自动为你处理数据
crossDomain:true,
success: function(json){
alert(json.code);
},
error: function(){
alert('fail');
}
});
});
</script>
</body>
</html>后台PHP：
<?php
class jsonp{
public function get(){
$code=$_GET['code'];
if($code==1){
$code=2;
}
echo 'returnjs({"code":"'.$code.'"})';
}
}The above introduces the simple record of using jsonp (1), including the content. I hope it will be helpful to friends who are interested in PHP tutorials.
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